|
%I #4 Dec 15 2017 17:37:10
%S 1,2,4,19,25,47,266,2016
%N Numbers n such that 10^n*(2+7*10^n)+7 is prime.
%C No more terms up to n=7500.
%o (PARI) is(n)=ispseudoprime(10^n*(2+7*10^n)+7) \\ _Charles R Greathouse IV_, Jun 13 2017
%K more,nonn
%O 1,2
%A _Jason Earls_, Dec 17 2009
|
