Chen's Theorem

Every ``large'' Even Integer may be written as $2n=p+m$ where $p$ is a Prime and $m\in P_2$ is the Set of Semiprimes (i.e., 2-Almost Primes).

See also Almost Prime, Prime Number, Semiprime

References

Rivera, C. ``Problems & Puzzles (Conjectures): Chen's Conjecture.'' http://www.sci.net.mx/~crivera/conjectures/conj_002.htm.