[seqfan] Re: On infinitude of A090918-A090919

Max Alekseyev maxale at gmail.com
Sat Nov 24 02:30:27 CET 2012

On Fri, Nov 23, 2012 at 1:51 PM, Vladimir Shevelev <shevelev at bgu.ac.il> wrote:

> The question of the infinitude of these sequences is reduced to unsolved
> question, whether there are infinitly many primes in every "progression"
> of the form a*prime(n)+b, gcd(a,b)=1.

This question includes in particular (for a=2 and b=1) infiniteness of
Sophie Germain primes, which is an open question for a couple hundred


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