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Primes p such that 91 is a square mod p.
1

%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_.