回复：Sigma(1/pi)=1/2+1/3+1/5+1/7+..............is going to infinit

Interesting, i googled these two sigma and understood twin primes are a "small" subset of primes. And I also know now twin primes are (6m-1, 6m+1) pairs except (3,5). I want to go back to discuss with my 8 year old son to see if he can understand this.

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• Yes,if yuor son can nderstand twin primes should be 6m-1 and 6m+ -jinjing- ♀ (129 bytes) () 01/07/2011 postreply 13:09:04