Quote: 


"Chen's work mentioned in the discussion of the Goldbach conjecture also showed that every even number is the difference between a prime and a P2."


from: [link](https://primes.utm.edu/notes/conjectures/)


However I can't get this verified or find different sources stating the same.


so question is: is this true? where can i find proof?


thanks.



p2 - p1 = 2n for every 2n
The two relevant papers for Chen's original proof are Chen, J.R. (1973). "On the representation of a larger even integer as the sum of a prime and the product of at most two primes". Sci. Sinica. 16: 157–176. and Chen, J.R. (1966). "On the representation of a large even integer as the sum of a prime and the product of at most two primes". Kexue Tongbao. 11 (9): 385–386. See [here](https://en.wikipedia.org/wiki/Chen%27s_theorem) for more details along with related strengthened results. 


