回复：关于素数的题目求助

来源: 于 2010-03-31 14:23:16 [旧帖] [给我悄悄话] 本文已被阅读：次

If p,q are different prime numbers,no one is 2,the difference is even number,it is not 0,so greater than 1.If p=2,q>3,q-p can't be 1.
大于3的素数都是2n+1is easier.