# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/

Search: id:a087685
Showing 1-1 of 1

%I A087685 #10 Feb 16 2021 01:00:18
%S A087685 2,5,7,11,13,17,19,23,29,31,37,41,47,53,61,67,71,73,79,83,89,97,101,
%T A087685 103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,193,
%U A087685 197,199,211,227,229,233,239,241,251,257,263,269,271,277,281,283,293,307
%N A087685 Primes p such that 5^p - 4^p is composite.
%o A087685 (PARI) apmb(a,b,n) = { forprime(x=2,n, y=a^x-b^x; if(!ispseudoprime(y), print1(x","); ) ) }
%Y A087685 Cf. A005060.
%K A087685 nonn
%O A087685 1,1
%A A087685 _Cino Hilliard_, Oct 26 2003
%E A087685 Checked by _Ray Chandler_, Apr 24 2007

# Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE