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Primes p such that 87 is a square mod p.
1

%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_.