Goldbach Conjecture

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Every even integer greater than $2$ is the sum of two primes.

Marginal Conjecture

Every integer greater than $5$ can be written as the sum of three primes.

Hilbert $23$

This problem is no. $8b$ in the Hilbert $23$.

Landau's Problems

This is the $1$st of Landau's problems.

Also see

Source of Name

This entry was named for Christian Goldbach.

Historical Note

Christian Goldbach actually proposed what is now known as Goldbach's Marginal Conjecture in $1742$ in a letter to Leonhard Paul Euler. Euler then proposed this stronger conjecture.

It was published in Edward Waring's Meditationes Algebraicae of $1770$.

It has been checked by computer for numbers up to at least $10^{18}$.

Partial results are given by Chen's Theorem and Vinogradov's Theorem.