Lemoine's Conjecture

Conjecture
Every odd integer $n$ such that $n > 5$ can be written as:
 * $2 p_1 + p_2$

where $p_1 \le p_2$ and both $p_1$ and $p_2$ are prime.

Also known as

 * Levy's Conjecture, for

Also see

 * Goldbach Conjecture