Proof of the Binary Goldbach Conjecture

1. Overview

Number theory, "the queen of mathematics" studies the structures and properties defined on integers and primes (Euclid [15], Hadamard [18], Hardy, Wright [20], Landau [26], Tchebychev [44]). Numerous problems have been raised and conjectures made, the statements of which are often simple but very difficult to prove. These main components include:

• Elementary arithmetic

  -

  Operations on integers, determination and properties of primes.

  (Basic operations, congruence, gcd, lcm, ………..).

  -

  Decomposition of integers into products or sums of primes

  (Fundamental theorem of arithmetic, decomposition of large numbers, cryptography and Goldbach's conjecture, see Filhoa,Jaimea,de Oliveira Gouveaa,Keller Füchter, [16]).

• Analytical number theory

  -

  Distribution of primes: Prime Number Theorem, the Riemann hypothesis, (see Hadamard [18], De la Vallée-Poussin [45], Littlewood [29] and Erdos [14],,.....).

  -

  Gaps between consecutive primes (Bombieri,Davenport [3], Cramer [9], Baker,Harmann,Iwaniec, Pintz [4,5,24], Granville [17], Maynard [31], Tao [43], Shanks [40], Tchebychev [44] and Zhang [49]).

• Algebraic, probabilistic, combinatorial and algorithmic number theories

  -

  Modular arithmetic.

  -

  Diophantine approximations and equations.

  -

  Arithmetic and algebraic functions.

  -

  Diophantine and number geometry.

  -

  Computational number theory.

2. Definitions Notations and Background

The integers h, m,M, n, N, k, K,p, q, Q, r,..…used in this article are always positive.

(2.1)

The symbol " │ " means: such as or knowing that.

(2.2)

$$\mathrm{Let} \mathcal{P} \mathrm{be} \mathrm{the} \mathrm{infinite} \mathrm{set} \mathrm{of} \mathrm{positive} \mathrm{primes} p_k \left(\mathrm{called}\mathrm{simply}\mathrm{primes}\right)$$

(2.3)

$$(p_1=2; p_2=3; p_3 =5; p_{4 }=7; p_5=11; p_6=13;\dots \dots \dots )$$

$$\mathrm{For} \mathrm{any} \mathrm{non}-\mathrm{zero} \mathrm{integer} K {\mathcal{P}}_K=\{ p\in \mathcal{P}:p\le 2K\}$$

(2.4)

Writing the large numbers calculated in Appendix 14 is simplified by defining the following constants:

$$\mathrm{M} = {10}^9; \mathrm{R} = 4.{10}^8; \mathrm{G} = {10}^{100}; \mathrm{S} = {10}^{500};\mathrm{T}={10}^{1000}$$

(2.5)

ln(x) denotes the neperian logarithm of the real x > 0

(2.6)

Let (${ W}_{2n})$ be the sequence of primes defined by

$$\forall n\in \mathbb{N}+3 W_{2n}=\mathrm{Sup} (p\in \mathcal{P}:p\le 2n-3)$$

(2.7)

For any odd prime q, let (${ Wq}_{2n})$ be the sequence of primes defined by

$$\forall n\in \mathbb{N} n\ge {\displaystyle \frac{(q+3)}{2}}{Wq}_{2n}=\mathrm{Sup} (p\in \mathcal{P}:p\le 2n-\mathrm{q})$$

(2.8)

Any sequence denoted by (${ G}_{2n})$ = (${ U}_{2n };V_{2n }$) verifying (2.9) is called a Goldbach sequence.

$$\forall \mathrm{n} \in \mathbb{N}+2 {\mathrm{ }U}_{2n},V_{2n}\in \mathcal{P}\mathrm{and} U_{2n}+V_{2n}=2\mathrm{n}$$

(2.9)

${\mathrm{ }U}_{2n}$ and $V_{2n}$ are also known as "Goldbach partitions or Goldbach decomponents".

Iwaniec,Pintz [24] have shown that for a sufficiently large integer n there is always a prime between n − $n^{23/42 }$ and n. Baker and Harman [4,5] concluded that there is a prime in the interval [ n; n + o ($n^{0.525}\left)\right].$ Thus this results provides an increase of the gap between two consecutive primes $p_k$and $p_{k+1 }$of the form

$$\forall \epsilon > 0 \exists k_{\epsilon }\in {\mathbb{ }\mathbb{N}}^{\mathrm{*}}│ \forall \mathrm{k} \in \mathbb{N} \mathrm{k} \ge k_{\epsilon }{p}_{k+1}- p_k< \epsilon .p_k^{0.525}$$

(2.10)

The results obtained on the Cramer-Granville-Maier-Nicely conjecture [1,3,9,17,30,32] imply the following majorization.

For any real c > 2 and for any integer k ≥ 500

$$p_{k+1}- p_k\le 0.7 {\mathrm{l}\mathrm{n}}^{\mathrm{c}}\left(p_k\right)(\mathrm{with} \mathrm{probability} \mathrm{one})$$

(2.11)

and

$$p_{k+1}$$

(2.12)

The following abbreviations have been adopted:

• Lagrange-Lemoine-Levy conjecture (3L) conjecture

(2.13)

• Bachet-Bézout-Goldbach conjecture (BBG) conjecture

(2.14)

• (Extreme) Goldbach decomponents (E).G.D.

(2.15)

3. Introduction

Chen [7], Hardy, Littlewood [21], Hegfollt, Platt [22], Ramaré, Saouter [35], Tao [43],

Tchebychev [44] and Vinogradov [46] have taken important steps and obtained promising results on the Goldbach conjecture (Any integer n ≥ 2 is the mean arithmetic of two primes). Indeed, Helfgott, Platt [22] proved the ternary Goldbach conjecture in 2013.

Silva, Herzog, Pardi [41] held the record for calculating the terms of Goldbach sequences after determining pairs of primes ($U_{2n}; V_{2n})$ verifying

$$\forall \mathrm{n} \in \mathbb{N} │ 4 \le 2\mathrm{n} \le {4.10}^{18}{U}_{2n}+V_{2n}=2\mathrm{n}$$

(3.1)

Goldbach's conjecture has also been verified for all even integers 2n satisfying

$${10}^{5k}\le 2n\le {10}^{5k}+{10}^8:k=3, 4, 5, 6,\dots \dots ,20$$

and

$${10}^{10k}\le 2n\le {10}^{10k}+{10}^9:k=20, 21, 22, 23, 24,\dots \dots ,30$$

by Deshouillers, te Riele, Saouter [11].

In previous research work there is no explicit construction of recurrent Goldbach sequences.

In this article, for any integer n greater than two the E.G.D. $U_{2n}$ and $V_{2n}$ are computed iteratively using a simple and efficient "localised" algorithm.

Using Maxima and Maple scientific computing software on a personal computer Silva's record is broken and many E.G.D. are calculated up to the neighbourhood of 2n = 10⁵⁰⁰, 10^1000, 10⁵⁰⁰⁰ and G.D. around ${10}^{10000}$ (see Sainty [37]

"In Researchgate.net, Internet Archive, and OEIS, E.G.D. files are supplied: E.G.D. File S Around 2n = ${10}^S$ for S = 1, 2, 3,............., 10000").

The binary Goldbach conjecture can be proved globally by strong recurrence on all G.D. using (${Wq}_{2n}$) sequences of primes in the same way via Goldbach(-) conjecture (Any even integer greater than one is the difference of two primes) demonstrated in Teorem 4.

• Remark.

• Chen conjecture: For any integer K ≥ 1 there are infinitely many pairs of primes with a difference equal to 2K.
• De Polignac conjecture: Same as Chen, but with consecutive pairs of primes.
• What we know:

April 2013, Yitang Zhang [49] demonstrates that the smallest even integer 2K verifying the conjecture is greater than 70 million.

In 2014, James Maynard [31] then Terence Tao [43] lowered this limit to 246.

We validate Chen’s weak conjecture by verifying directly in the primes tables that all even gaps from 2 to 246 are possible (see Appendix 15).

In addition, the (3L) conjectures [10,23,25,28,47] and its generalization called (BBG) conjecture are validated.

Using case disjunction reasoning we construct two recurrent E.G.D. sequences of primes (${ V}_{2n }$) and (${ U}_{2n }$) according to the sequence ($W_{2n})$ by the following process

Firstly,

$$U_4=2 \mathrm{and} V_{4 }=2$$

(3.2)

For any integer n greater than two

• Either

(2n - $W_{2n}$) is a prime

then $V_{2n}$ and $U_{2n}$ are defined directly in terms of $W_{2n}.$

• Either

(2n - $W_{2n})$ is a composite number

then $V_{2n}$ and $U_{2n}$are determined from the previous terms of the sequence (${ G}_{2n})$.

(This process can be reversed by first determining the increasing sequence of primes less than Inf (2n - $W_{2k}$ ∈ $\mathcal{P}$: k ∈ ℕ), which saves a lot of computing time when programming).

4. Theorem (Chen’s Weak or Goldbach(-) Conjecture)

$$\forall \mathrm{K} \in \mathbb{N}* \exists \mathrm{p}, \mathrm{q} \in \mathcal{P}│\mathrm{p}-\mathrm{q}=2\mathrm{K}$$

(4.1)

If K ≥ 2 3 ≤ q ≤ 2K and 3 + 2K ≤ p ≤ 4K

Practical method on some examples:

First of all (5 - 3 = 2), then we begin the process at (7 - 3 = 4); we will select the smallest primes for which the difference is precisely 6 (11 - 5 = 6), then 8 (11 - 3 = 8), then 10

(13 - 3 = 10),........., then 2K (demonstration established by strong recurrence, by the asurd and feedback). All pairs of Goldbach(-) partitions obtained by this method for K between 2 and 123 are listed in Appendix 15 to validate it using Tao results.

Proof. An other proof can also be established by strong recurrence on the integer K ≥ 2. Let ${\mathcal{P}}_{Chen}$(K) be the following property

$$" \forall \mathrm{K} \in \mathbb{N}* \exists \mathrm{p}, \mathrm{q} \in \mathcal{P}│\mathrm{p}-\mathrm{q}=2\mathrm{K} 3\le \mathrm{q}\le 2\mathrm{K}\mathrm{and}2\mathrm{K}+2\le \mathrm{p}\le 4\mathrm{K} "$$

(4.2)

► ${\mathcal{P}}_{Chen}$(2) is true: 7 - 3 = 4 q = 3 ≤ 4 and p = 7 ≤ 4 x 2 = 8

► Let’s show

$$\forall M \in \mathbb{N} \mathbf{│} 2 \le M \le K \mathrm{then} {\mathcal{P}}_{Chen}(M ⟹{\mathcal{P}}_{Chen}(K+1)$$

We reason through the absurd

Let p, q ∈ ${\mathcal{P}}_K$ │ p ≥ q

$$\forall P,Q \in \mathcal{P}\mathbf{│} P \ge Q\exists h, m\in \mathbb{N}│$$

P = p + 2h and Q = q + 2m

we assume that

P - Q = p + 2h - q - 2m ≠ 2(K + 1)

(4.3)

Therefore

p - q ≠ 2(K + 1 - h + m)

(4.4)

You can always choose h ≥ m and h - m ≤ K + 1.

The set {K + 1 - h + m; 2h and 2m are any gaps between primes} contains all even integers between 2 and 2K.

However the strong recurrence hypothesis asserts that

$$\forall M\in \mathbb{N} \mathbf{│} M \le K\exists p, q \in \mathcal{P}│p-q=2M$$

(4.5)

By choosing:

M = K + 1 - h + m

t$\mathrm{h}\mathrm{i}\mathrm{s}\mathrm{c}\mathrm{o}\mathrm{n}\mathrm{t}\mathrm{r}\mathrm{a}\mathrm{d}\mathrm{i}\mathrm{c}\mathrm{t}\mathrm{s}$ (4.4).

So

$$\exists h,m\in \mathbb{N}│P-Q=p+2h-q-2m=2(K+1)$$

(4.6)

knowing

$$p, p+2h, q, q+2m \in \mathcal{P} h\ge m\mathrm{and}h-m\le K+1$$

Thus validating the heredity of property ${\mathcal{P}}_{Chen}$(K).

The property ${\mathcal{P}}_{Chen}$(K) is therefore true. As a result Goldbach(-) conjecture is validated.

5. Corollary

Let ${(R}_{2K})$ and ${(Q}_{2K})$ be two sequences of primes determined by

$$R_{2K}=\mathrm{Inf} (\mathrm{p} \in \mathcal{P}:\mathrm{p} - 2\mathrm{K} \in \mathcal{P})\mathrm{and} \underset{-}{Q_{2K}}=\mathrm{Inf} (\mathrm{p} \in \mathcal{P}:2\mathrm{K}+\mathrm{p} \in \mathcal{P})=R_{2K}-2K$$

(5.1)

$$\mathit{They}\mathit{are}\mathit{defined}\mathit{for}\mathit{any}\mathit{integer}K\in \mathbb{N}*$$

(5.2)

and satisfy

$$\lim R_{2K}=+\mathrm{\infty }$$

(5.3)

$${\forall K\in {\mathbb{N}}^{\mathrm{*}}R}_{2K}, \underset{-}{Q_{2K}}\in \mathcal{P}\mathrm{and} R_{2K}- Q_{2K}=2K$$

(5.4)

$$\forall K\in {\mathbb{N}}^{\mathrm{*}}│ 2 \le \mathrm{K} \le 16 3 \le \underset{-}{Q_{2K}}\le 2\mathrm{K} \mathrm{and} 2\mathrm{K}+3 \le R_{2K}\le 4K$$

(5.5)

For any integer K large enough

$$3 \le \underset{-}{Q_{2K}}\le {\left(2K\right)}^{0.525}\mathrm{and} 2K+3 \le R_{2K}\le 2K+{\left(2K\right)}^{0.525}$$

(5.6)

Proof.

(5.1); (5.2): According to the previous theorem, the sequences ($R_{2K }$) and ($\underset{-}{Q_{2K}}$) are defined by strong recurrence (finite descent).

(5.3): $R_{2K}$ ≥ 2K $⟹$ lim $R_{2K}$ = +$\mathrm{\infty }$(5.4): By construction, these sequences thus verify: $R_{2K}$ - $Q_{2K}$ = 2K

(5.5): The property can be verified directly term-to-term by examining the sequence proposed above.

(5.6): This property is verified up to 2K = 246 by calculations on the previous list.

We prove this result by recurrence

First of all, we order the Goldbach(-) decomponents at a fixed prime q, so as to obtain the estimate (5.6) more easily.

Let $q_r$ be the (r + 1)th prime:

We examine the sequences of primes ($T_r$(K)${)}_{K\in \mathbb{N}}$ satisfying:

$T_1$(K) = 2K + 3

($T_1$(K); 2K) → (5;2); (7 4); (11;8); (13;10); (17;14); (19;16); (23;20); (29;26); (29;28);..

$T_2$(K) = 2K + 5

($T_2$(K); 2K) → (7;2); (11;6); (13;8); (17;12); (19;14); (23;18); (29;24); (31;26); (37;32)................................

$T_3$(K) = 2K + 7

($T_3$(K); 2K) → (11;4); (13;6); (17;10); (19;12); (23;16); (29;22); (31;24); (37;30)...........

$T_4$(K) = 2K + 11

(T11(K); 2K) → (13;2); (17;6); (19;8); (23;12); (29;18); (31;20); (37;26); (41;30); (43;34).........................

(T13(K); 2K) → (17;4); (19;6); (23;10);(29;16); (31;18); (37;24); (41;28); (43;30; (47;34)..........................

......................................

$T_r$(K) = 2K + $q_r$ (K ∈ ${\mathbb{N}}^{*}$: $T_r$(K) and $q_r$ are primes) (see Appendix 16)

For any integer K satisfying ${\left(2K\right)}^{0.525}$ > $q_r$ the property holds for $T_r$(K).

Therefore it is generally validated for all K > $K_0$, since we obtain all possible cases of

Chen's weak conjecture starting with $T_1$(K), then $T_2$(K), then $T_3$(K).... for ${\left(2K\right)}^{0.525}$ ≤ $q_r.$(can be proved by strong recurrence using the same method as in Theorem 4 by "finite descent").

Let a = ${\displaystyle \frac{40}{21}}$ and $P_a$(r) be the following property

"For any integer M │ 2M < ${\left(q_r\right)}^a$ there exists at least a prime q < $q_r$ │ 2 M + q ∈ $\mathcal{P} \text{'}\text{'}$▶ $P_a$($K_0$) is true (see Appendix 16).

▶ Let’s show: $P_a$(r) $⟹P_a$(r + 1)

$$q_{r+1}\le q_r+q_r^{0.525}$$

(5.6)

It is assumed that M │

$T_{r+1}$(K) - $q_{r+1}$ ≠ 2M knowing 2M < ${\left(q_{r+1}\right)}^{c_p}$

$$\forall T_m\left(R\right), q_m\in \mathcal{P}\exists h, s \in \mathbb{N} │ T_{r+1}\left(K\right)=T_m\left(R\right)+2h\mathrm{and} q_{r+1}=q_m+2s$$

(5.7)

then

$$T_m\left(R\right) - q_m\ne 2(M+s-h)$$

(5.8)

which is impossible according to the hypothesis of strong recurrence since

2(M + s - h) is less than Sup ${\left(q_m\right)}^a$and that all primes $T_m$(R), $q_m$ satisfy the recurrence hypothesis.

We deduce that: ${Pc}_p$(r) $⟹{Pc}_p$(r + 1)

Thus the property (5.5) is true.

6. Lemma (Goldbach’s Fundamental Lemma)

Let q be an odd prime

For any integer n ≥$n_q$there exists an integer s │

$$2n - {Wq}_{2s}\in \mathcal{P}$$

(6.1)

Let (${Zq}_{2n}$) be the sequence of primes defined by

$$\forall n\in \mathbb{N} n \ge n_q{Zq}_{2n}=\mathrm{Inf} (2n-{Wq}_{2k}\in \mathcal{P}:k\in \mathbb{N}$$

(6.2)

All G.D. are contains in the set {(2n - ${Zq}_{2n}$; ${Zq}_{2n}$) n ∈ ℕ + 3}

For any integer n ≥ $n_0$

$${Z3}_{2n}\le {\left(2n\right)}^{0.525}$$

(6.3)

$${Z3}_{2n}\le o{\left(2n\right)}^{0.525}$$

(6.4)

Proof. The proofs of propositions (6.1), (6.2) and (6.3) are established following the same principle of strong recurrence as in Theorem 4 and Corollary 5 by "return, absurd and finite descent"

(6.1): For any integer n > 3 and for any odd primes r, q │ 3 ≤ r < q,

there exists an integer $M_r$ │

$$2\mathrm{n} - {Wq}_{2k}=2\mathrm{n} - 2M_r- {Wr}_{2k}=2(\mathrm{n} - M_r) - {Wr}_{2k}$$

or

$$2(\mathrm{n}+1) - {Wq}_{2k}=2(\mathrm{n}+1 - M_r) - {Wr}_{2k}$$

then by recurrence and the absurd the property is validated.

(Proof to develop).

Remark. A better estimate of the following form can be obtained by the same method with probability one or on average using the results of Bombieri [3], Cramer [9], Granville [17],

Nicely [32] and Maier [30]:

$\forall$ n ∈ ℕ: n ≥ $n_0$;

$$\mathrm{For}\mathrm{any}\mathrm{real}c > 2 U_{2n}< 1.7{ln\left(n\right)}^c\left(\mathit{with}\mathit{probability}\mathit{one}\right)$$

(6.5)

and

$${\exists K\mathrm{’}\ge 3.5│U}_{2n}< K.{\mathrm{l}\mathrm{n}}^{1.3}\left(\mathit{n}\mathit{on}\mathit{average}\right)$$

(6.6)

7. Principle of proof

To determine the E.G.D. three sequences of primes ($W_{2n}),(V_{2n}$), ($U_{2n})$ are defined and they verify the following properties

$$\lim V_{2n}=+\mathrm{\infty }.$$

(7.1)

$$\forall n \in \mathbb{N}+2 V_{2n} \mathrm{is} \mathrm{defined} \mathrm{as} \mathrm{a} \mathrm{function} \mathrm{of} W_{2n}=\mathrm{Sup}(p\in Ƥ:p\le 2n-3)$$

(7.2)

$$(W_{2n}) \mathrm{is} \mathrm{an} \mathrm{increasing} \mathrm{sequence} \mathrm{of} \mathrm{primes} \mathrm{that} \mathrm{contains} \mathrm{all} \mathrm{of} \mathrm{them} \mathrm{except} p_1=2$$

(7.3)

$$\lim W_{2n}=+\mathrm{\infty }$$

(7.4)

$$({ U}_{2n }) \mathrm{is} \mathrm{a} \mathrm{complementary} \mathrm{sequence} \mathrm{to} (W_{2n})\mathrm{of}\mathrm{negligible}\mathrm{primes}\mathrm{with}\mathrm{respect}\mathrm{to}2n$$

(7.5)

For any integer n $\ge 3$

• If (2n -$W_{2n }$) is a prime

then $V_{2n}$ and $U_{2n}$ are defined by

$$V_{2n}=W_{2n}\mathrm{and} U_{2n}=2n - W_{2n}$$

(7.6)

• Otherwise, if (2n -$W_{2n }$)is a composite number

we search for two previous terms of the sequence (${ G}_{2n }$), $U_{2(n-k)}$₎ and $V_{2(n-k)}$ satisfying the following conditions

$$U_{2\left(n-k\right)}, V_{2\left(n-k\right)}, [U_{2\left(n-k\right)}+2\mathrm{k} ] \in \mathcal{P}$$

(7.7)

$$U_{2\left(n-k\right)}+V_{2\left(n-k\right)}=2\left(n-k\right)$$

which is always possible (see Theorem 4 and "Goldbach’s fundamental Lemma 6")

So by setting

$$V_{2n}=V_{2(n-k)}\mathrm{and} U_{2n}=U_{2(n-k)}+2k$$

(7.8)

two new primes $V_{2n}$ and $U_{2n}$ satisfying (4.10) are generated │

$$U_{2n}+V_{2n}=2n$$

(7.9)

This process is then repeated incrementing n by one unit (n ← n + 1).

• Remark. Using the same method as in Theorem 4, we can the following equivalent property by strong recurrence: For any integer n greater than 48

$${\mathcal{P}}_{ret}\left(\mathrm{n}\right): " \mathrm{There} \mathrm{exists} \mathrm{an} \mathrm{integer} \mathrm{K} \mathrm{such} \mathrm{that} 2\mathrm{K}+U_{2(n-k)}\in \mathcal{P}"$$

(7.10)

To this end,.

▶ ${\mathcal{P}}_{ret}$(49) is true.

▶ The heredity of the property ${\mathcal{P}}_{ret}$(n): ${\mathcal{P}}_{ret}$ (n) $⟹{ \mathcal{P}}_{ret}$(n + 1)

can be proved by the absurd and returning to the previous terms by noting that

For any integer r │ r ≤ n, there is at least one integer ${\mathrm{M}}_{\mathrm{r}}$ │

$$U_{2(n+1-k)}=2M_r+U_{2(r+1-k)}$$

then

$$\begin{gathered} 2\mathrm{K}+U_{2\left(n+1–k\right)}=2(\mathrm{K}+M_r)+U_{2\left(r+1–k\right)} \\ =2\mathrm{P}+U_{2(r+1+M_r-P)} \end{gathered}$$

(7.11)

By posing: P = K + $M_r$ and $r+1+M_r$ ≤ n

Now, according to the recurrence hypothesis on ${\mathcal{P}}_{ret}$(n) there exists an integer P │

$$2P+U_{2(r+1+{ M}_r-P)}\in \mathcal{P}$$

(7.12)

then there exists an integer K │

$$2K+U_{2(n+1-k)}\in \mathcal{P}$$

(7.13)

In summary, the property ${\mathcal{P}}_{ret}$(n) is hereditary and, as a result, verifiable.

We apply the same type of reasoning using Theorem 4 to the general case with the sequence (${Wq}_{2n}$), showing:

For any integer n > 2 there exists an integer K │

$$2\mathrm{K}+q_{2n}\in \mathcal{P}$$

8. Theorem (Goldbach conjecture)

(i) There exists at least a recurrent sequence ($G_{2n}$) = ($U_{2n}; V_{2n})$ of primes satisfying the following conditions.

For any integer n ≥$2$

$$U_{2n},V_{2n}\mathsf{ϵ}\mathcal{P}\mathrm{and} U_{2n}+V_{2n}=2n$$

(8.1)

(Any integer n ≥ $2$ is the mean arithmetic of two primes)

$$\left(\mathrm{ii}\right) \mathrm{A}n\mathrm{algorithm} \mathrm{can} \mathrm{be}\mathrm{used}\mathrm{to} \mathrm{explicitly} \mathrm{compute}\mathrm{any}\mathrm{term} { U}_{2n}\mathrm{and} V_{2n}$$

(8.2)

Proof.

▄ GLOBAL STRONG RECURRENCE:

The proof can be made using the following strong recurrence principle.

Let $P_G$(n) be the property defined for any integer n ≥ 2 by

$P_G$(n): " For any integer p satisfying 2 ≤ p ≤ n there exists two primes$U_{2p}$and$V_{2p}$ such their sum is equal to 2p ".

$$(\forall \mathrm{p} \in \mathbb{N} │ 2 \le \mathrm{p} \le \mathrm{n} U_{2p},V_{2p}\in \mathcal{P}\mathrm{and} U_{2p}+V_{2p}=2p)$$

Let's show by strong recurrence that $P_G$(n) is true for any integer n ≥ 2

▶ $P_G$(2) is true: it suffices to choose ${ U}_4$ = $V_4$ = 2.

▶ Let's show that the property $P_G$(n) is hereditary: $P_G$(n) $⟹P_G$(n + 1)

Assume property $P_G$(n) is true.

• If (2(n + 1) - $W_{2(n+1) }$) is a prime

then $V_{2(n+1) }$ and $U_{2(n+1) }$ are defined by

$$V_{2(n+1)}=W_{2(n+1)}\mathrm{and} U_{2(n+1)}=2(n+1) - W_{2(n+1)}$$

(8.3)

• Otherwise, if (2(n+1) -$W_{2(n+1) }$) is a composite number

there exists an integer k to obtain two terms $U_{2(n+1-k)}$₎ and $V_{2(n+1-k)}$ satisfying the following conditions

$$U_{2(n+1-k)}, V_{2(n+1-k)}\mathrm{and} U_{2(n+1-k)}+2k\in Ƥ$$

(8.4)

$$U_{2\left(n+1-k\right)}+V_{2\left(n+1-k\right)}=\left(n+1-k\right)$$

we use the previous terms of the sequence ($G_{2n }$).

For any integer q │ 1 ≤ q ≤ n - 3 we have

$$3 \le U_{2(n-q)}\le n.$$

Then there exists an integer k 1 ≤ k ≤ n - 3 │

$$R_{2n}=U_{2(n-k)}+2k\in Ƥ$$

(8.5)

following the Bertrand principle and Theorem 4 since all primes smaller than ${\left(2n\right)}^{0.525 }$ are in the set {${ U}_{2k}$: k ≤ n }

(If there were no such primes, we would have a contradiction with the Theorem 4 or with Goldbach’s fundamental Lemma 6). In fact, in an equivalent way (see the previous remark) we can copy the proof of Teorem 4 by performing a similar strong recurrence ”finite descent feedback and absurd” directly on the set { $U_{2k}$: k ≤ n } │

$$R_{2n}=U_{2(n-k)}+2k\in Ƥ$$

(8.6)

The smallest integer k │ $R_{2n}$∈ Ƥ is denoted by $k_n.$

So by setting

$$U_{2n}=U_{2\left(n-k_n\right)}+2k_n\mathrm{and} V_{2n}=V_{2\left(n-k_n\right)}\in Ƥ$$

(8.7)

(These two terms are primes)

In the previous steps two primes ${ U}_{2\left(n-k_n\right)}$ and $V_{2\left(n-k_n\right)}$whose sum is equal to 2(n - $k_n$) were

determined.

$$U_{2\left(n-k_n\right)}+V_{2\left(n-k_n\right)}=2(n-{ k}_n)$$

(8.8)

By adding the term $2k_n$ to each member of the equality (8.6) it follows

$$U_{2\left(n-k_n\right)}+2k_n+V_{2\left(n-k_n\right)}=2(\mathrm{n} - k_n)+2k_n$$

(8.9)

$$\iff [ U_{2\left(n-k_n\right)}+2k_n]+V_{2\left(n-k_n\right)}=2n$$

(8.10)

$$\iff U_{2n}+V_{2n}=2n$$

(8.11)

Two new primes $V_{2(n+1)}$ and $U_{2(n+1)}$ satisfying (${ U}_{2(n+1)}$ + $V_{2(n+1)}$ = 2(n + 1)) are generated.

It follows that $P_G$(n + 1) is true. Then the property $P_G$(n) is hereditary:

$$P_G\left(\mathrm{n}\right) ⟹P_G(\mathrm{n}+1)$$

Therefore for any integer n ≥ 2 the property $P_G$(n) is true.

It follows

$\forall$ n ∈ ℕ + 2 there are two primes $U_{2n}$ and $V_{2n}$ and such their sum is 2n: $U_{2n}$ + $V_{2n}$ = 2n

▄ ALGORITHM:

For any integer n $\ge 3$

• If (2n -$W_{2n }$) is a prime

then $V_{2n }$ and $U_{2n}$ are defined by

$$V_{2n}=W_{2n}\mathrm{and} U_{2n}=2n - W_{2n}$$

(8.12)

• Otherwise, if (2n -$W_{2n})$is a composite number

we use the previous terms of the sequence ($G_{2n }$).

For any integer q │ 1 ≤ q ≤ n - 3 we have

$$3 \le U_{2(n-q)}\le n.$$

Then there exists an integer k 1 ≤ k ≤ n - 3 │

$$R_{2n}=U_{2(n-k)}+2k\in Ƥ$$

following Theorem 4 since all primes smaller than ${\left(2n\right)}^{0.525 }$ are in the set {${ U}_{2k}$: k ≤ n }

(If there were no such primes, we would have a contradiction with the Theorem 4 or with Goldbach’s fundamental Lemma 6). In fact, in an equivalent way (see the previous remark) we can copy the proof of Teorem 4 by performing a similar strong recurrence ‘’finite descent return and absurd” directly on the set { $U_{2k}$: k ≤ n } │

$$R_{2n}=U_{2(n-k)}+2k\in Ƥ$$

(8.14)

The smallest integer k │ $R_{2n}$∈ Ƥ is denoted by $k_n.$

So

$$U_{2n}=U_{2\left(n-k_n\right)}+2k_n\mathrm{and} V_{2n}=V_{2\left(n-k_n\right)}\in Ƥ$$

(8.15)

(These two terms are primes)

In the previous steps two primes ${ U}_{2\left(n-k_n\right)}$ and $V_{2\left(n-k_n\right)}$whose sum is equal to 2(n - $k_n$) were determined.

$$U_{2\left(n-k_n\right)}+V_{2\left(n-k_n\right)}=2(n-{ k}_n)$$

(8.16)

By adding the term $2k_n$ to each member of the equality (8.16) it follows

$$U_{2\left(n-k_n\right)}+2k_n+V_{2\left(n-k_n\right)}=2(\mathrm{n} - k_n)+2k_n$$

(8.17)

$$\iff [ U_{2\left(n-k_n\right)}+2k_n]+V_{2\left(n-k_n\right)}=2n$$

(8.18)

$$\iff U_{2n}+V_{2n}=2n$$

(8.19)

Finally, for any integer n ≥ 3 this algorithm determines two sequences of primes ($U_{2n}$) and ($V_{2n}$) verifying Goldbach's conjecture.

9. Lemma

The sequence (${ U}_{2n})$verifies the followingmajorization

For any integer n ≥ 65

$$U_{2n}\le (2{n)}^{0.525}$$

(9.1)

and

$$U_{2n}= \left(\right(2{n)}^{0.525})$$

(9.2)

Proof. According to the programm 12.2 and Appendix 13 the majorization (9.1) is verified for any integer n │ 65 ≤ n ≤ 2000.

For any integer n > 2000 the proof is established by recurrence. For this purpose let $P_{bhip}$(n) be the following property

$$P_{bhip}\left(n\right): " U_{2n}\le {\left(2n\right)}^{0.525}".$$

(9.3)

▶ $P_{bhip}$(2000) is true according to program 12.2 and the table in appendix 13.

▶ For any integer n ≥ 2000 let’s show that $P_{bhip}$(n) is hereditary:

$$P_{bhip}\left(\mathrm{n}\right) ⟹.P_{bhip}(\mathrm{n}+1)$$

Assume that $P_{bhip}$(n) is true: then

• If (2(n + 1) -$W_{2(n+1)})$is a prime

then $V_{2(n+1)}$ and $U_{2(n+1)}$ are defined by

$$V_{2(n+1)}=W_{2(\mathrm{n}+1)}\mathrm{and} U_{2(n+1) }=2(n+1) - W_{2(n+1)}$$

(9.4)

According to the results in [4,5,24] (see Lemma 9) there is a constant K > 0 such that

$$\begin{gathered} 2(\mathrm{n}+1) - \mathrm{K}.{\left[2\right(n+1\left)\right]}^{0.525}< W_{2(n+1)} \\ ⟹U_{2\left(n+1\right)}=2(\mathrm{n}+1) – W_{2\left(n+1\right)}< \mathrm{K} {.\left[2\left(n+1\right)\right]}^{0.525} \\ ⟹U_{2(n+1)}\le K {.\left[2\right(n+1\left)\right]}^{0.525}2(n+1) \end{gathered}$$

• Otherwise, if (2(n + 1) - $W_{2(n+1)}$) is a composite number

$$\exists \mathrm{p} \in {\mathbb{N}}^{\mathrm{*}}│ U_{2(n+1)}=U_{2(n+1-p)}+2p$$

(9.5)

According to [4,5,24]

$$U_{2(n+1)}=2\mathrm{p}+U_{2(n+1-p)}=2\mathrm{p}+2(\mathrm{n}+1 - \mathrm{p}) - W_{2(n+1-p)}=2(\mathrm{n}+1) - W_{2(n+1-p)}$$

(9.6)

Via " Goldbach's fundamental Lemma 6 " it follows that

$$U_{2(n+1)}< \mathrm{K}.[{2(n+1)]}^{0.525}$$

(9.7)

$P_{bhip}$(n + 1) is true then $P_{bhip}$(n) is hereditary.

So for any integer n ≥ 2000 the property $P_{bhip}$(n) is true.

Finally $U_{2(n+1)}$ ≤ ${\left[2\right(n+1\left)\right]}^{0.525}$

• Remark. A more precise estimate can be obtained using the Cipolla or Axler frames [2,8].

10. Theorem

For any integer n$\ge$3 it is easy to check

$$\left(W_{2n}\right)\mathrm{is}\mathrm{a}\mathrm{positive}\mathrm{increasing}\mathrm{sequence}\mathrm{of}\mathrm{primes}$$

(10.1)

$$\{ W_{2n}: \mathrm{n} \in \mathrm{IN}+3 \} \cup \{2\}=\mathcal{P}$$

(10.2)

$$\lim W_{2n}=+oo$$

(10.3)

$$(U_{2n}) \mathrm{and} (V_{2n}) \mathrm{are} \mathrm{sequences} \mathrm{of} \mathrm{primes} \mathrm{and} \mathrm{the} \mathrm{set} \{ U_{2k}:k\le n\}$$

(10.4)

contains all primes less than ln( n )

$$\mathrm{n} \le V_{2n}\le W_{2n}$$

(10.5)

$$3\le {2n-W_{2n}\le U}_{2n}\le n$$

(10.6)

$$\lim V_{2n}=+oo$$

(10.7)

Proof.

(10.1): For any integer n ≥ 2 ${ \mathcal{P}}_n \subset {\mathcal{P}}_{n+1}.$Therefore, $W_{2n}$ ≤ $W_{2(n+1)}$. So the sequence (${ W}_{2n }$) is increasing.

(10.2): Any prime except $p_1$ = 2 is odd, hence the result.

(10.3): lim $W_{2n}$ = lim $p_k$ = +oo

(10.4): By definition $V_{2n}$ = $W_{2n}$ or there exits an integer k ≤ n - 2 │ $V_{2n}$ = $V_{2(n-k)}$.

So the terms of the sequence ($V_{2n)}$) are primes.

(10.5): According to Lemma 9, for any integer n ≥ 65

$$U_{2n}< {\left(2n\right)}^{0.525}$$

therefore

$$U_{2n}< {\left(2n\right)}^{0.55}<n$$

and

$$V_{2n}=2\mathrm{n} - U_{2n}>2n-n>n$$

For any integer n │ 3 ≤ n ≤ 65 verification is carried out according to the computer program in paragraph 12.2 and the table in appendix 13.

We can also see that by construction $V_{2n}$ ≥ $U_{2n}$ because if we assume the opposite then $V_{2n}$ is not the largest prime number verifying

$${\displaystyle \frac{1}{2}}(U_{2n}+V_{2n})=n.$$

So

$$V_{2n}\ge n$$

According to (10.5)

$$\mathrm{n} \le V_{2n}⟹U_{2n}=2\mathrm{n} - V_{2n}\le 2n-\le n$$

(10.6)

$$V_{2n}\le W_{2n}⟹2\mathrm{n} - W_{2n}\le 2\mathrm{n} - V_{2n}=U_{2n}$$

(10.7)

By (10.5) for any integer n ≥ 2: n $\le$ $V_{2n}$

$$\lim V_{2n}=+oo.$$

11. Lemma

We dissociate the following cases mod 6 for any even integer 2n n ≥ 3: p + q = 2n p, q∈ Ƥ

• If 2n = 6m then (p; q) = (6r + 5; 6(m - r - 1) + 1) or (6r+1; 6(m - 1 - r) + 5)
• If 2n = 6m + 2 then (p; q) = (6r + 1; 6(m - r) + 1)
• If 2n = 6m + 4 then (p; q) = (6r + 5; 6(m- 1 - r) + 5)

Table. Sum of integers 1, 5 modulo 6 (in $\mathbb{Z}$/6$\mathbb{Z}$).

p+ q mod 6	1	5
1	2	0
5	0	4

Table. Sum of integers 1, 5 modulo 6 (in $\mathbb{Z}$/6$\mathbb{Z}$).

p+ q mod 6	1	5
1	2	0
5	0	4

(To adapt with 2n = 30m + k).

Table. Sum of integers 1, 7, 11, 13, 17, 19, 23, 29 modulo 30 (in $\mathbb{Z}$/30$\mathbb{Z}$).

+ mod 30	1	7	11	13	17	19	23	29
1	2	8	12	14	18	20	24	0
7	8			20	24	26	0	6
11	12	18	22	24	28	0	4	10
13	14	20	24	26	0	2	6	12
17	18	24	28	0	4	6	10	16
19	20	26	0	2	6	8	12	18
23	24	0	4	6	10	12	16	22
29	0	6	10	12	16	18	22	28

Table. Sum of integers 1, 7, 11, 13, 17, 19, 23, 29 modulo 30 (in $\mathbb{Z}$/30$\mathbb{Z}$).

+ mod 30	1	7	11	13	17	19	23	29
1	2	8	12	14	18	20	24	0
7	8			20	24	26	0	6
11	12	18	22	24	28	0	4	10
13	14	20	24	26	0	2	6	12
17	18	24	28	0	4	6	10	16
19	20	26	0	2	6	8	12	18
23	24	0	4	6	10	12	16	22
29	0	6	10	12	16	18	22	28

Proof.

12. Properties

$$\mathit{For}\mathit{any}\mathit{integer}k\ge 2 \mathit{t}\mathit{here}\mathit{are}\mathit{infinitely}\mathit{many}\mathit{integers}n│ U_{2n}=p_k$$

(12.1)

$$V_{2n}~2n(n\to +oo)$$

(12.2)

For any integer n ≥ 5000

$${ U}_{2n}\ll V_{2n}\mathrm{and} \lim ({\displaystyle \frac{U_{2n}}{V_{2n}}})=0$$

(12.3)

$$\mathit{The}\mathit{smallest}\mathit{integer}n │U_{2n}\ne 2n - W_{2n}\mathit{is}\mathit{obtained}\mathit{for} n=49 \mathit{and} G_{98}=(79;19)$$

(12.4)

(This type of terms increases in the Goldbach sequence ($G_{2n})$ as n increases in the sense of the Schnirelmann density and there are an infinite number of them; their proportion per interval can be computed using the results given in [39]).

$$\mathit{The}\mathit{sequence} (G_{2n}) \mathit{is}""\mathit{in}\mathit{the}\mathit{sense}\mathit{that}\mathit{for}\mathit{any}\mathit{integer} \mathrm{n} \ge 2$$

(12.5)

$V_{2n}$ and $U_{2n}$ are the largest and smallest possible primes │ $U_{2n}$ + $V_{2n}$ = 2n.

The Cramer-Granville-Maier-Nicely conjecture [9, 17,30,32] is verified with probability one. It leads to the following majorization

For any integer p ≥ 500

$$U_{2p}\le 0.7 [{\mathrm{l}\mathrm{n}\left(2p\right)]}^{(2.2-{\displaystyle \frac{1}{p}})}\left(\mathrm{with}\mathrm{probability}\mathrm{one}\right)$$

(12.7)

The proof is similar to that ofLemma9 and is validated by the studying functions of the type

f: x$\to$a.g (x) + b${\left[ln\right(g\left(x\right)\left)\right]}^c$ (a,b > 0; c > 2) with

g: x$\to$0.7 [l${n\left(x\right)]}^{(c - {\displaystyle \frac{1}{x}})}$and h: x$\to$0.7${ \left[ln\right(x\left)\right]}^{(2.2 - {\displaystyle \frac{1}{x}})}$ by using Maple software.

A better estimate can be obtained via [29,30,31].

According to Bombieri [3] and using the same method as in the proof of Lemma 9,

we obtain the following estimate of${ U}_{2n}$

$$\forall \epsilon > 0 U_{2n}=O \left({\mathrm{l}\mathrm{n}}^{1.3+\epsilon }\right(n\left)\right)\left(\mathit{on}\mathit{average}\right)$$

(12.8)

13. Algorithm

13.1. Algorithm written in natural language.

• Inputs:
• Input four integer variables: k, N, n, P
• Input: $p_1$= 2, $p_2$= 3, $p_3$ = 5, $p_4=$ 7,................., $p_N$ the first N primes.

: n ← 3

: P = M, R, G, S or T as indicated in paragraph 2

• Algorithm body:

A) 

Compute: $W_{2n}$ = Sup(p $\in \mathcal{P}$: p ≤ 2n - 3)

• If ${\mathit{T}}_{2\mathit{n}}$= (2n - ${\mathit{W}}_{2\mathit{n}}$) is a prime

$$U_{2n}\leftarrow T_{2n}\mathrm{and} V_{2n }\leftarrow W_{2n}$$

(13.1.1)

otherwise

B) 

If${\mathit{T}}_{2\mathit{n}}$is a composite number

• Let: k = 1

B.1) While $U_{2\left(n-k\right)}$ + 2k is a composite number

$$\mathrm{assign} \mathrm{to} k\mathrm{the} \mathrm{value} k+1 (k⟵k+1).$$

return to B1)

• End while
• Assign to k the value $k_n$ ($k_n⟵k$)

• Let:

$$U_{2n}=U_{2\left(n-k_n\right)}+2k_n\mathrm{and} V_{2n}=V_{2\left(n-k_n\right)}$$

(13.1.2)

• Assign to n the value n + 1 (n$⟵ n+1$and return to A)

• End:
• Outputs for integers less than ${10}^{4:}:$

$$\mathrm{Print} (2\mathrm{n}=●; 2\mathrm{n} - 3=●; W_{2n}=●; T_{2n}=●; V_{2n}=●; U_{2n}=●)$$

• Outputs for large integers:

$$\mathrm{Print} (2\mathrm{n} - \mathrm{P}=●; 2\mathrm{n} - 3 - \mathrm{P}=●; W_{2n}- \mathrm{P}=●; T_{2n}=●; {V_{2n}-P=\mathrm{●};U}_{2n}=●)$$

13.2. Program written with Maxima software for 2n around ${10}^{1000}$

• c: 10**1000; forn:c +40000step 2 thruc +40100do
• (b:2,test: 0, b: next_prime(b),e:n - b,
• if primep(e)
• then print(n -c, b, e - c)
• else whiletest= 0do(e:n -b, if primep(e)
• then test:1, print(n -c, b, e - c)
• else test: 0,b:next-prime(b));

13.3. Program written with Maplesoft Maple for 2n around ${10}^{1000}$

• G:= 10^1000:
• V:= [1, 11, 13, 17, 19, 23, 29]:
• A:= G + 500000:
• B:= A + 59:
• b:=2:
• st:= time():
• forq fromA by 6 to B do # Program modulo 30.using the results of Lemma 11
• Possibility of inverting the two loops or defining three similar structures with s:= 0, 1, 2.

for s from 0 to 2 do

• n:= q + s + s:

b:= trunc(0.59b - 20); # Improving computation time: the idea is to recognise that for any integer n large enough there exists a Goldbach decomponent ${p\text{'}}_n$ and a successor ${p\text{'}}_{n+1}$such that

• (E):│${p\mathrm{\text{'}}}_{n+1}$ - ${p\mathrm{\text{'}}}_n$│< k ${\mathrm{l}\mathrm{n}}^s$(n); this reduces the number of ‘nextprime(●)’ operations which take up the most computing time.
•        (If G = ${10}^{500}$: Computingtime is around 10 sec for thirty terms;The algorithm can be refined by exploiting frame (E). Cesàro averages can also be used to determine the initial condition for b).

• t:= 0:
• R:= [[1, 5], [1,5]]: Q:= [[1, 7, 11, 13, 17, 19, 23, 29], [1, 13, 19], [11, 17, 23], [7, 13, 17, 19, 23, 29], [1, 7, 19], [11, 17, 23, 29], [1, 11, 13, 19, 23, 29], [1, 7, 13], [17, 23, 29], [1, 7, 11, 17, 19, 29], [1, 19, 7, 13], [11, 23, 29], [1, 23, 7, 17, 11, 13], [7, 19, 13], [11, 17, 29]]:

  while t = 0 do.

    b:= nextprime(b + 100); # Additional test possible by improving Lemma 11. (with V mod 30).

# Possibility of replacing nextprime with a faster procedure (see Sainty [37]).(the computation time is greatly reduced by replacing with b:=nextprime(b + k(b,G)), k(b,G) constant around 150 for G=${10}^{1000}$, k(b,G) chosen randomly with the rand procedure or very slowly increasing as a function of b and G), but in general we don't obtain the E.G.D. but any Goldbach decomponents.

      e:= n - b;

      K:= emod 6;

         if K in R[s+1] then

            if isprime(e)

            Thent:= 1;

            print(n - G, b, e - G);

         end if;

      end if;

    end do:

  end do:

end do:

Computingtime:= time() - st;

RESULTS:

G =${10}^{1000}$

b:= nextprime(b+rand(100..150))	b:= nextprime(b+100)	b:= nextprime(b+150)
n - G b n - G - b 500000, 54133, 445867 500002, 40693, 459309 500004, 422393, 77611 500006, 49157, 450849 500008, 222991, 277017 500010, 259451, 240559 500012, 521981, -21969 500014, 622561, -22547 500016, 342929, 157087 500018, 25097, 474921 500020, 95083, 404937 500022, 201821, 298201 500024, 226337, 273687 500026, 255859, 244167 500028, 8147, 491881 500030, 83833, 416197 500032, 43261, 456771 500034, 162251, 337783 500036, 179203, 320833 500038, 12601, 487437 500040, 608471,-108431 500042, 157103, 342939 500044, 145531, 354513 500046, 440303, 59743 500048, 162577, 337471 500050, 258637, 241413 500052, 111791, 388261 500054, 139661, 360393 500056, 126397, 373659 500058, 40739, 459319 500060, 106121, 393939 ComComputtime:= 179.343 sec	500000, 139387, 360613 500002, 40693, 459309 500004, 731447, -231443 500006, 54139, 445867 500008, 205651, 294357 500010, 100109, 399901 500012, 40693, 459319 500014, 261823, 238191 500016, 82913, 417103 500018, 300889, 199129 500020, 12583, 487437 500022, 233591, 266431 500024, 159871, 340153 500026, 106087, 393939 500028, 608459, -108431 500030, 30347, 469683 500032, 43261, 456771 500034, 201833, 298201 500036, 186859, 313177 500038, 95101, 404937 500040, 121763, 378277 500042, 9029, 491013 500044, 148663, 351381 500046, 304847, 195199 500048, 157109, 342939 500050, 40459, 459591 500052, 8171, 491881 500054, 223037, 277017 500056, 49207, 450849 500058, 301349, 198709 Computtime:= 188.250 sec	500000, 361069, 138931 500002, 40693, 459309 500004, 535637, -35633 500006, 277789, 222217 500008, 205651, 294357 500010, 138959, 361051 500012, 40693, 459319 500014, 145501, 354513 500016, 198659, 301357 500018, 26309, 473709 500020, 77347, 422673 500022, 160709, 339313 500024, 162553, 337471 500026, 106087, 393939 500028, 263009, 237019 500030, 151813, 348217 500032, 24049, 475983 500034, 400031, 100003 500036, 145037, 354999 500038, 854257, -354219 500040, 121763, 378277 500042, 8161, 491881 500044, 145987, 354057 500046, 304847, 195199 500048, 12611, 487437 500050, 163729, 336321 500052, 100151, 399901 500054, 155291, 344763 500056, 126397, 373659 500058, 208277, 291781 500060, 67547, 432513 Computime:= 163.828 sec

b:= nextprime(b+rand(100..150))	b:= nextprime(b+100)	b:= nextprime(b+150)
n - G b n - G - b 500000, 54133, 445867 500002, 40693, 459309 500004, 422393, 77611 500006, 49157, 450849 500008, 222991, 277017 500010, 259451, 240559 500012, 521981, -21969 500014, 622561, -22547 500016, 342929, 157087 500018, 25097, 474921 500020, 95083, 404937 500022, 201821, 298201 500024, 226337, 273687 500026, 255859, 244167 500028, 8147, 491881 500030, 83833, 416197 500032, 43261, 456771 500034, 162251, 337783 500036, 179203, 320833 500038, 12601, 487437 500040, 608471,-108431 500042, 157103, 342939 500044, 145531, 354513 500046, 440303, 59743 500048, 162577, 337471 500050, 258637, 241413 500052, 111791, 388261 500054, 139661, 360393 500056, 126397, 373659 500058, 40739, 459319 500060, 106121, 393939 ComComputtime:= 179.343 sec	500000, 139387, 360613 500002, 40693, 459309 500004, 731447, -231443 500006, 54139, 445867 500008, 205651, 294357 500010, 100109, 399901 500012, 40693, 459319 500014, 261823, 238191 500016, 82913, 417103 500018, 300889, 199129 500020, 12583, 487437 500022, 233591, 266431 500024, 159871, 340153 500026, 106087, 393939 500028, 608459, -108431 500030, 30347, 469683 500032, 43261, 456771 500034, 201833, 298201 500036, 186859, 313177 500038, 95101, 404937 500040, 121763, 378277 500042, 9029, 491013 500044, 148663, 351381 500046, 304847, 195199 500048, 157109, 342939 500050, 40459, 459591 500052, 8171, 491881 500054, 223037, 277017 500056, 49207, 450849 500058, 301349, 198709 Computtime:= 188.250 sec	500000, 361069, 138931 500002, 40693, 459309 500004, 535637, -35633 500006, 277789, 222217 500008, 205651, 294357 500010, 138959, 361051 500012, 40693, 459319 500014, 145501, 354513 500016, 198659, 301357 500018, 26309, 473709 500020, 77347, 422673 500022, 160709, 339313 500024, 162553, 337471 500026, 106087, 393939 500028, 263009, 237019 500030, 151813, 348217 500032, 24049, 475983 500034, 400031, 100003 500036, 145037, 354999 500038, 854257, -354219 500040, 121763, 378277 500042, 8161, 491881 500044, 145987, 354057 500046, 304847, 195199 500048, 12611, 487437 500050, 163729, 336321 500052, 100151, 399901 500054, 155291, 344763 500056, 126397, 373659 500058, 208277, 291781 500060, 67547, 432513 Computime:= 163.828 sec

b:= nextprime(b+rand(150..175))	b:= nextprime(b+rand(140..160))
n-G b n-b-G	n-G b n-b-G
500000, 139387, 360613 500002, 90481, 409521 500004, 422393, 77611 500006, 145007, 354999 500008, 604339, -104331 500010, 138959, 361051 500012, 221021, 278991 500014, 334843, 165171 500016, 297779, 202237 500018, 167267, 332751 500020, 54577, 445443 500022, 139409, 360613 500024, 336491, 163533 500026, 12589, 487437 500028, 263009, 237019 500030, 145517, 354513 500032, 334861, 165171 500034, 163697, 336337 500036, 318979, 181057 500038, 221047, 278991 500040, 761591, -261551 500042, 178691, 321351 500044, 54601, 445443 500046, 174989, 325057 500048, 84229, 415819 500050, 163729, 336321 500052, 159899, 340153 500054, 155291, 344763 500056, 166183, 333873 500058, 151841, 348217 Computtime:= 174.438 sec	500000, 112429,-387571 500002, 40693, 459309 500004, 277787, 222217 500006, 82903, 417103 500008, 148627, 351381 500010, 139397, 360613 500012, 40693, 459319 500014, 145501, 354513 500016, 388313, 111703 500018, 258329, 241689 500020, 77347, 422673 500022, 453683, 46339 500024, 67511, 432513 500026, 221197, 278829 500028, 263009, 237019 500030, 112459, 387571 500032, 178681, 321351 500034, 208253, 291781 500036, 274019, 226017 500038, 14071, 485967 500040, 162257, 337783 500042, 361111, 138931 500044, 52903, 447141 500046, 582299, -82253 500048, 8167, 491881 500050, 67537, 432513 500052, 111791, 388261 500054, 126641, 373413 500056, 126397, 373659 500058, 40739, 459319 Computtime:= 138.578 sec	Record: 116 sec; see in researchgate files PDFGOLDBACHTEST4,10 (For n from G+5000000 to 5000058 by 2), [37].

b:= nextprime(b+rand(150..175))	b:= nextprime(b+rand(140..160))
n-G b n-b-G	n-G b n-b-G
500000, 139387, 360613 500002, 90481, 409521 500004, 422393, 77611 500006, 145007, 354999 500008, 604339, -104331 500010, 138959, 361051 500012, 221021, 278991 500014, 334843, 165171 500016, 297779, 202237 500018, 167267, 332751 500020, 54577, 445443 500022, 139409, 360613 500024, 336491, 163533 500026, 12589, 487437 500028, 263009, 237019 500030, 145517, 354513 500032, 334861, 165171 500034, 163697, 336337 500036, 318979, 181057 500038, 221047, 278991 500040, 761591, -261551 500042, 178691, 321351 500044, 54601, 445443 500046, 174989, 325057 500048, 84229, 415819 500050, 163729, 336321 500052, 159899, 340153 500054, 155291, 344763 500056, 166183, 333873 500058, 151841, 348217 Computtime:= 174.438 sec	500000, 112429,-387571 500002, 40693, 459309 500004, 277787, 222217 500006, 82903, 417103 500008, 148627, 351381 500010, 139397, 360613 500012, 40693, 459319 500014, 145501, 354513 500016, 388313, 111703 500018, 258329, 241689 500020, 77347, 422673 500022, 453683, 46339 500024, 67511, 432513 500026, 221197, 278829 500028, 263009, 237019 500030, 112459, 387571 500032, 178681, 321351 500034, 208253, 291781 500036, 274019, 226017 500038, 14071, 485967 500040, 162257, 337783 500042, 361111, 138931 500044, 52903, 447141 500046, 582299, -82253 500048, 8167, 491881 500050, 67537, 432513 500052, 111791, 388261 500054, 126641, 373413 500056, 126397, 373659 500058, 40739, 459319 Computtime:= 138.578 sec	Record: 116 sec; see in researchgate files PDFGOLDBACHTEST4,10 (For n from G+5000000 to 5000058 by 2), [37].

• 500000, 9473, 490527
• 500002, 24019, 475983
• 500004, 8123, 491881
• 500006, 9479, 490527
• 500008, 25087, 474921
• 500010, 57917, 442093
• 500012, 8999, 491013
• 500014, 9001, 491013
• 500016, 40697, 459319
• 500018, 9491, 490527
• 500020, 9007, 491013
• 500022, 139409, 360613
• 500024, 9011, 491013
• 500026, 9013, 491013
• 500028, 8147, 491881
• 500030, 26321, 473709
• 500032, 24049, 475983
• 500034, 54167, 445867
• 500036, 57943, 442093
• 500038, 9511, 490527
• 500040, 57947, 442093
• 500042, 8161, 491881
• 500044, 24061, 475983
• 500046, 162263, 337783
• 500048, 8167, 491881
• 500050, 12613, 487437
• 500052, 8171, 491881
• 500054, 9041, 491013
• 500056, 9043, 491013
• 500058, 40739, 459319
• Computingtime: 343.453 s

G=${10}^{2000}$

n – G	n - b - G	b	n - G	b	n - b –
40000,	39957,	43	40050,	86117,	-46067
40002,	39091,	911	40052,	503,	39549
40004,	39957,	47	40054,	97,	39957
40006,	39549,	457	40056,	89393,	-49337
40008,	25369,	14639	40058,	101,	39957
40010,	39957,	53	40060,	103,	39957
40012,	39549,	463	40062,	971,	39091
40014,	17737,	22277	40064,	107,	39957
40016,	39957,	59	40066,	109,	39957
40018,	39957,	61	40068,	977,	39091
40020,	39091,	929	40070,	113,	39957
40022,	39141,	881	40072,	523,	39549
40024,	39957,	67	40074,	983,	39091
40026,	35443,	4583	40076,	16937,	23139
40028,	39957,	71	40078,	937,	39141
40030,	39957,	73	40080,	4637,	35443
40032,	39091,	941	40082,	941,	39141
40034,	35443,	4591	40084,	127,	39957
40036,	39957,	79	40086,	4643,	35443
40038,	39091,	947	40088,	131,	39957
40040,	39957,	83	40090,	541,	39549
40042,	23139,	16903	40092,	4649,	35443
40044,	39091,	953	40094,	137,	39957
40046,	39957,	89	40096,	139,	39957
40048,	39549,	499	40098,	31991,	8107
			40100,	1009,	39091

n – G	n - b - G	b	n - G	b	n - b –
40000,	39957,	43	40050,	86117,	-46067
40002,	39091,	911	40052,	503,	39549
40004,	39957,	47	40054,	97,	39957
40006,	39549,	457	40056,	89393,	-49337
40008,	25369,	14639	40058,	101,	39957
40010,	39957,	53	40060,	103,	39957
40012,	39549,	463	40062,	971,	39091
40014,	17737,	22277	40064,	107,	39957
40016,	39957,	59	40066,	109,	39957
40018,	39957,	61	40068,	977,	39091
40020,	39091,	929	40070,	113,	39957
40022,	39141,	881	40072,	523,	39549
40024,	39957,	67	40074,	983,	39091
40026,	35443,	4583	40076,	16937,	23139
40028,	39957,	71	40078,	937,	39141
40030,	39957,	73	40080,	4637,	35443
40032,	39091,	941	40082,	941,	39141
40034,	35443,	4591	40084,	127,	39957
40036,	39957,	79	40086,	4643,	35443
40038,	39091,	947	40088,	131,	39957
40040,	39957,	83	40090,	541,	39549
40042,	23139,	16903	40092,	4649,	35443
40044,	39091,	953	40094,	137,	39957
40046,	39957,	89	40096,	139,	39957
40048,	39549,	499	40098,	31991,	8107
			40100,	1009,	39091

G =${10}^{3000}$

n– G	b	n - b- G
100000,	36529,	63471
100002,	77069,	22933
100004,	22717,	77287
100006,	181873,	-81867
100008,	12239,	87769
100010,	4547,	95463
100012,	4549,	95463
100014,	22727,	77287
100016,	59497,	40519
100018,	24847,	75171
100020,	12251,	87769
100022,	12253,	87769
100024,	4561,	95463
100026,	22739,	77287
100028,	22741,	77287
100030,	4567,	95463
100032,	12263,	87769
100034,	36563,	63471
100036,	42649,	57387
100038,	12269,	87769
100040,	23143,	76897
100042,	36571,	63471
100044,	43973,	56071
100046,	4583,	95463
100048,	24877,	75171
100050,	12281,	87769

n– G	b	n - b- G
100000,	36529,	63471
100002,	77069,	22933
100004,	22717,	77287
100006,	181873,	-81867
100008,	12239,	87769
100010,	4547,	95463
100012,	4549,	95463
100014,	22727,	77287
100016,	59497,	40519
100018,	24847,	75171
100020,	12251,	87769
100022,	12253,	87769
100024,	4561,	95463
100026,	22739,	77287
100028,	22741,	77287
100030,	4567,	95463
100032,	12263,	87769
100034,	36563,	63471
100036,	42649,	57387
100038,	12269,	87769
100040,	23143,	76897
100042,	36571,	63471
100044,	43973,	56071
100046,	4583,	95463
100048,	24877,	75171
100050,	12281,	87769

G =${10}^{5000}$

n- G	b	n - b- G	n- G	b	n - b- G	n- G	b	n - b- G
100000,	31147,	68853	100050,	12611,	87439	100100,	31247,	68853
100002,	309371,	-209369	100052,	12613,	87439	100102,	31249,	68853
						100104,	105071,	-4967
						100106,	13649,	86457
100004,	31151,	68853	100054,	13597,	86457	100108,	640669,	-540561
100006,	31153,	68853	100056,	105023,	-4967	100110,	12671,	87439
100008,	12569,	87439	100058,	12619,	87439	100112,	31259,	68853
						100114,	87991,	12123
						100116,	122033,	-21917
						100118,	18379,	81739
100010,	13553,	86457	100060,	54151,	45909
100012,	31159,	68853	100062,	108971,	-8909
100014,	108923,	-8909	100064,	103091,	-3027
100016,	12577,	87439	100066,	87943,	12123
100018,	592237,	-492219	100068,	18329,	81739
100020,	104987,	-4967	100070,	13613,	86457
100022,	12583,	87439	100072,	31219,	68853
100024,	13567,	86457	100074,	264881,	-
100026,	18287,	81739	100076,	12637,	87439
100028,	12589,	87439	100078,	107971,	-7893
100030,	31177,	68853	100080,	12641,	87439
100032,	61871,	38161	100082,	76913,	23169
100034,	13577,	86457	100084,	13627,	86457
100036,	31183,	68853	100086,	12647,	87439
100038,	108947,	-8909	10038,	108947,	-8909	100088,	61927,	38161
100040,	12601,	87439	100090,	13633,	86457
100042,	31189,	68853	100092,	12653,	87439
100044,	457091,	-357047	100094,	61933,	38161
100046,	18307,	81739	100096,	87973,	12123
100048,	13591,	86457	100098,	12659,	87439
100120,	31267,	68853
100122,	61961,	38161
						100124,	31271,	68853
100126,	13669,	86457
100128,	12689,	87439
100130,	31277,	68853
100132,	76963,	23169
100134,	122051,	-21917
100136,	12697,	87439
100138,	13681,	86457
100140,	18401,	81739
100142,	12703,	87439
100144,	13687,	86457
100146,	152993,	-52847
100148,	13691,	86457
100150,	13693,	86457
1000000,	35509,	964491
1000002,	113,	999889
1000004,	69193,	930811
1000006,	95233,	904773
1000008,	69197,	930811
1000010,	31873,	968137
1000012,	35521,	964491
1000014,	69203,	930811
1000016,	127,	999889
1000018,	35527,	964491
1000020,	131,	999889

n- G	b	n - b- G	n- G	b	n - b- G	n- G	b	n - b- G
100000,	31147,	68853	100050,	12611,	87439	100100,	31247,	68853
100002,	309371,	-209369	100052,	12613,	87439	100102,	31249,	68853
						100104,	105071,	-4967
						100106,	13649,	86457
100004,	31151,	68853	100054,	13597,	86457	100108,	640669,	-540561
100006,	31153,	68853	100056,	105023,	-4967	100110,	12671,	87439
100008,	12569,	87439	100058,	12619,	87439	100112,	31259,	68853
						100114,	87991,	12123
						100116,	122033,	-21917
						100118,	18379,	81739
100010,	13553,	86457	100060,	54151,	45909
100012,	31159,	68853	100062,	108971,	-8909
100014,	108923,	-8909	100064,	103091,	-3027
100016,	12577,	87439	100066,	87943,	12123
100018,	592237,	-492219	100068,	18329,	81739
100020,	104987,	-4967	100070,	13613,	86457
100022,	12583,	87439	100072,	31219,	68853
100024,	13567,	86457	100074,	264881,	-
100026,	18287,	81739	100076,	12637,	87439
100028,	12589,	87439	100078,	107971,	-7893
100030,	31177,	68853	100080,	12641,	87439
100032,	61871,	38161	100082,	76913,	23169
100034,	13577,	86457	100084,	13627,	86457
100036,	31183,	68853	100086,	12647,	87439
100038,	108947,	-8909	10038,	108947,	-8909	100088,	61927,	38161
100040,	12601,	87439	100090,	13633,	86457
100042,	31189,	68853	100092,	12653,	87439
100044,	457091,	-357047	100094,	61933,	38161
100046,	18307,	81739	100096,	87973,	12123
100048,	13591,	86457	100098,	12659,	87439
100120,	31267,	68853
100122,	61961,	38161
						100124,	31271,	68853
100126,	13669,	86457
100128,	12689,	87439
100130,	31277,	68853
100132,	76963,	23169
100134,	122051,	-21917
100136,	12697,	87439
100138,	13681,	86457
100140,	18401,	81739
100142,	12703,	87439
100144,	13687,	86457
100146,	152993,	-52847
100148,	13691,	86457
100150,	13693,	86457
1000000,	35509,	964491
1000002,	113,	999889
1000004,	69193,	930811
1000006,	95233,	904773
1000008,	69197,	930811
1000010,	31873,	968137
1000012,	35521,	964491
1000014,	69203,	930811
1000016,	127,	999889
1000018,	35527,	964491
1000020,	131,	999889

Maple program corrected and improved by the online code checker (IA): https://grasp.info/fr/tools/ai-code-fixer, CODEGPT, Yihao.com and IA CLAUDE, (see Sainty [37]).

17. Perspectives and generalizations

17.1 Other Goldbach sequences (${G\text{'}}_{2n}$) independent of $\left(G_{2n}\right)$ may be studied using the increasing sequences of primes (${W\text{'}}_{2n})$ defined by

For any integer n $\ge 3$

$${W\text{'}}_{2n}=\mathrm{Sup} (p \mathsf{ϵ}\mathcal{P}: p\le f(n\left)\right)$$

(17.1.1)

f is a function defined on the interval I = [3; +$\mathrm{\infty }$[ and satisfying the following conditions

• f is strictly increasing on the interval I
• f (3) = 3 and $\underset{x\to +\infty }{\lim }f\left(x\right)$ = +$\mathrm{\infty }$$\forall x \mathsf{ϵ} I f\left(x\right)\le 2x-3$

For example, one of the following functions defined on I can be selected.

• f: x$\to$a x + 3 - 3a (a$\in \mathbb{R}$: 0 < a$\le 2)$
• g: x$\to$[ 4$\sqrt{3x}-$9 ] ([x] is the integer part of the real x)
• h: x$\to 6 \mathrm{l}\mathrm{n}\left( {\displaystyle \frac{x}{3}} \right)$ + 3

17.2 Using this method it would be interesting to study the Schnirelmann density [39] of primes 3, 5, 7, 11,........... in the sequence ($U_{2n }$) on variable intervals and the Caesaro sums of $U_{2n}$ E.D.G.’s with a view to more efficient programming for their calculation.

17.3 It is possible to exceed the values shown in the table of 2n = ${10}^{1000 }$ (Many E.G.D have been calculated for values of 2n in the order of ${10}^{2000},$ ${10}^{5000}$ (or ${10}^{10000}$ G.D.,see Sainty [37]) by perfecting this algorithm, exploiting the fact that one of Goldbach's decomponents can be chosen equal to 4p + 3, (G.D. are primes of the form 6m + 1 or

6m + 5 and can be expressed more precisely using primes of the form 30m + r:

r ∈ [1,7,11,13,17,19,23,29] (see Table mod 30, Lemma 11),by using De Pocklington Theorem [6,34,36], Primality tests [37], Cipolla-Axler-Dusart type functions and improvment of primes frames [2,8,12,13,37] via a new Prime number Theorem to better identify the terms of gmail(${ G}_{2n }),\mathrm{supercomputers}\mathrm{and}\mathrm{more}$ $\mathrm{efficients}\mathrm{software}\mathrm{as}$ C++, or Assembleur compilation.

17.4 Any Goldbach decomponent of order 2n = ${10}^{10000}$ can be determined more quickly by replacing the instruction b:=2 by b:=trunc(c.b + d) and b:= nextprime(b) with b:= nextprime(b + k(b, G)), where k(b, G) is a constant of around 150 for G = 10¹⁰⁰⁰ and is chosen randomly using the rand procedure or increases very slowly as a function of b and G. An increasing sequence of primes, $b_k$, can also be determined in stages by replacing the initial value b:=2 by b:=trunc($k_0.$b - $k_1$.${\mathrm{l}\mathrm{n}}^{\mathrm{s}}$(n) - $k_2$) and by setting c:= trunc(a.${\mathrm{l}\mathrm{n}}^d$(b)), 1 ≤ d ≤ 2 and b:= b + c for each stage, followed by b:= nextprime(b) until the next stage, (see Sainty [37]; Note that for any even integer 2n large enough there exists G.D. ${p\text{'}}_n$, ${p\text{'}}_{n+1}$, ${q\text{'}}_n$, ${q\text{'}}_{n+1}$│ ${p\text{'}}_n$ + ${q\text{'}}_n$ = 2n and ${p\text{'}}_{n+1}$ + ${q\text{'}}_{n+1}$ = 2(n + 1) with

${p\text{'}}_{n+1 }$- ${p\text{'}}_n$ and ${q\text{'}}_{n+1}$ - ${q\text{'}}_n$ < k.${\mathrm{l}\mathrm{n}}^{\mathrm{s}}$(n)). It is therefore advisable to develop adaptive algorithms based on this model using A.I., as a function of the program's G parameter.

17.5 Diophantine equations and conjectures of the same nature ((3L) conjecture [9,21,23,26,27,44]) can be processed using similar reasoning and algorithms.

▄ To validate the (3L) conjecture we study the following sequences of primes (W$l_{2n}$), (${ Vl}_{2n}) \mathrm{a}\mathrm{n}\mathrm{d}({Ul}_{2n}) \mathrm{defined}\mathrm{by}$

$$\mathrm{For}\mathrm{any}\mathrm{integer}n\ge 3{Wl}_{2n}=\mathrm{Sup} (\mathrm{p} \mathsf{ϵ}\mathcal{P}:p\le n-1)$$

(17.5.1)

• If${Tl}_{2n }$= (2n + 1 - 2 ${Wl}_{2n})$ is a prime

then let

$${ Vl}_{2n}={Wl}_{2n}\mathrm{and} { Ul}_{2n}={Tl}_{2n}$$

(17.5.2)

• If${Tl}_{2n}$ is a composite number

then there exists an integer k 1 $\le k\le n-3 │$

$${Ul}_{2\left(n-k\right)}+2k \in \mathcal{P}$$

(17.5.3)

then let

$${Vl}_{2n}={Vl}_{2\left(n-k\right)}\mathrm{and} {Ul}_{2n}={ Ul}_{2\left(n-k\right)}+2k$$

(17.5.4)

▄ Using the same type of reasoning a generalization, the (BBG) conjecture of the following form can be validated

• Let K and Q be two odd integers prime to each other:

For any integer n │ 2n$\ge 3$(K + Q) there exist two primes${Ub}_{2n}$and${Vb}_{2n}$verifying

$$\mathrm{K}. {Ub}_{2n}+\mathrm{Q}. {Vb}_{2n}=2n$$

(17.5.5)

• Let K and Q be two integers of different parity prime to each other:

For any integer n │ 2n $\ge 3$(K + Q) there are two primes ${Ub}_{2n}$ and ${ Vb}_{2n}$ verifying

$$K{.Ub}_{2n}+Q{Vb}_{2n}=2n+1$$

(17.5.6)

17.6 Remark.

GOLDBACH (-):

$R_{2K}$ = Inf (p ∈ $\mathcal{P}$: p - 2K ∈ $\mathcal{P})$ and $Q_{2K}$ = Inf (p ∈ $\mathcal{P}:$ 2K + p ∈ $\mathcal{P})$ = $R_{2K}$ - 2K

GOLDBACH (+):

$V_{2K}$ = Sup (p ∈ $\mathcal{P}:$ 2K - p ∈ $\mathcal{P})$ and $U_{2K}$ = Inf (p ∈ $\mathcal{P}$: 2K - p ∈ $\mathcal{P}$) = 2K - $V_{2K}$(Is it possible to envisage a symmetry in the Goldbach triangle parametrized by arithmetic sequences between the representations of primes and integers ?)

17.7 The sequences (${Wq}_{2n}$) generate all the G.D. and may enable us to better estimate the values of distribution function G of the Goldbach's Comet, $\mathrm{p}\mathrm{r}\mathrm{o}\mathrm{b}\mathrm{a}\mathrm{b}\mathrm{l}\mathrm{y}\mathrm{o}\mathrm{f}\mathrm{t}\mathrm{y}\mathrm{p}\mathrm{e}:$$a_1$.E / ${\mathrm{l}\mathrm{n}}^2$(E) < G(E) < $a_2$.E / ${\mathrm{l}\mathrm{n}}^2$(E), see Woon [48].

18. Conclusion

18.1 A recurrent and explicit Goldbach sequence ($G_{2n}$) = (${ U}_{2n }$; $V_{2n})$ verifying

$\forall$ n ∈ $\mathbb{N}+2U_{2n}$, $V_{2n}$ ∈ $\mathcal{P}\mathrm{a}\mathrm{n}\mathrm{d}{U}_{2n}$ +$V_{2n}$= 2n

has been developed using an simple and efficient "localised" algorithm.

18.2 The records of Silva [41] and Deshouillers, te Riele, Saouter [11] are beaten on a personal computer. Hundreds E.G.D. $U_{2n}$ and $V_{2n }$ are obtained for values around 2n =${ 10}^{1000 }$, twenty-six around 2n =${ 10}^{2000 },$seventy-five around 2n =${ 10}^{5000 }$ and G.D. around 2n = ${ 10}^{10000 }$ for a computation time of less than three hours (see Sainty [37]).

18.3 For a given integer n ≥ 49 the evaluation of the terms $U_{2n}$ and $V_{2n}$ does not require the computing of all previous terms $U_{2k}$ and $V_{2k}$ │ 1 $\le$k < n - 1. We just need to know the terms satisfying

$$U_{2k}\le 5.{\mathrm{l}\mathrm{n}}^{1.3}\left(2n\right)\mathrm{and} 2n- 5.{\mathrm{l}\mathrm{n}}^{1.3}\left(2n\right) \le V_{2k }\le 2n\left(\mathrm{on}\mathrm{average}\right)$$

(18.3.1)

This property allows any E.G.D $U_{2n}$ and $V_{2n}$ to be calculated quite quickly, the upper limit being defined by the scientific software and the computer's ability to determine the largest prime preceding 2n - 2 (next or prevprime(2n - 2) function).

18.4 Therefore the (BBG), the (3L) and the binary Goldbach(- / +) conjectures "Any even integer greater than three is the sum and difference of two primes" are true.

In fact these two conjectures are intertwined.