%I #7 Sep 08 2012 06:19:51
%S 2,3,13,17,19,23,29,31,41,43,59,71,79,83,89,101,107,109,113,127,137,
%T 163,167,179,181,211,227,239,241,269,271,277,293,307,313,317,331,347,
%U 349,367,373,379,383,389,397,419
%N Primes p such that 87 is a square mod p.
%H Vincenzo Librandi, <a href="/A038975/b038975.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Prime[Range[120]], ! JacobiSymbol[87, #] == -1 &] (* _Vincenzo Librandi_, Sep 08 2012 *)
%K nonn
%O 1,1
%A _N. J. A. Sloane_.