Editing Chen's theorem (section)

{{Short description|Every large even number is either sum of a prime and a semi-prime or two primes}}
[[File:Chen Jing-run.JPG|right|thumb|The statue of Chen Jingrun at [[Xiamen University]].]]

In [[number theory]], '''Chen's theorem''' states that every sufficiently large [[parity (mathematics)|even]] number can be written as the sum of either two [[prime number|primes]], or a prime and a [[semiprime]] (the product of two primes).

It is a weakened form of [[Goldbach's conjecture]], which states that every even number is the sum of two primes.