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%I #11 Feb 04 2015 09:36:49
%S 7,29,31,37,41,43,53,59,61,71,83,97,101,107,109,113,127,137,149,157,
%T 167,179,191,199,227,241,251,257,263,281,283,307,311,313,317,331,347,
%U 349,353,379,397,409,419,433,461
%N Primes p such that 55 is not a square mod p.
%H Vincenzo Librandi, <a href="/A038934/b038934.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Prime@Range[120], JacobiSymbol[55, #] == -1 &] (* _Vincenzo Librandi_, Sep 09 2012 *)
%o (PARI) select(n->!issquare(Mod(55,n)),primes(100)) \\ _Charles R Greathouse IV_, Sep 09 2012
%K nonn
%O 1,1
%A _N. J. A. Sloane_
%E Offset changed from 0 to 1 by _Vincenzo Librandi_, Sep 09 2012
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