[seqfan] Re: both p -/+ 2 is prime power

[W. Edwin Clark]

If p = 7 then p+2 = 9 is not prime.

See: http://mathforum.org/library/drmath/view/56063.html
<http://math.stackexchange.com/questions/549458/prove-that-the-only-prime-triple-is-3-5-7>

also see https://en.wikipedia.org/wiki/Prime_triplet



On Sat, Oct 17, 2015 at 1:45 AM, юрий герасимов <2stepan at rambler.ru> wrote:

>
> Dear SeqFans,
>
> Primes p such that both p - 2 and p + 2 is prime power: 3, 5, 7, 11, 29,
> 241, 59051, .... What in the next ( > 5*10^8 ) one ?
>
> Best regards. JSG
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