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%I #12 Sep 08 2022 08:44:53
%S 11,17,19,23,29,31,37,41,53,61,67,83,109,113,131,137,149,151,157,163,
%T 167,173,179,193,197,223,229,233,239,263,283,293,347,349,353,367,373,
%U 383,401,409,431,439,449,461,467
%N Primes p such that 79 is not a square mod p.
%C Also, only entries p=1 (mod 4) of the sequence are not squares mod 79 (from the quadratic reciprocity law). - _Lekraj Beedassy_, Jul 21 2004
%H Vincenzo Librandi, <a href="/A038966/b038966.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Prime@Range[120], JacobiSymbol[79, #] == - 1 &] (* _Vincenzo Librandi_, Sep 09 2012 *)
%o (Magma) [ p: p in PrimesUpTo(467) | not IsSquare(R! 79) where R:= ResidueClassRing(p) ]; // _Vincenzo Librandi_, Sep 10 2012
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_.
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