%I #7 Sep 08 2012 06:19:58
%S 3,5,7,11,13,29,41,53,67,71,73,89,97,103,113,131,139,151,163,199,229,
%T 233,239,241,251,277,283,293,311,331,337,349,353,359,367,373,379,389,
%U 397,409,419,431,439,461,463,467
%N Primes p such that 91 is a square mod p.
%H Vincenzo Librandi, <a href="/A038979/b038979.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Prime[Range[120]], ! JacobiSymbol[91, #] == -1 &] (* _Vincenzo Librandi_, Sep 08 2012 *)
%K nonn
%O 1,1
%A _N. J. A. Sloane_.