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Primes p such that 38 is a square mod p.
2

%I #9 Sep 08 2012 01:45:18

%S 2,11,13,17,19,29,31,37,43,53,71,73,79,83,103,109,127,131,137,139,151,

%T 163,167,173,181,223,233,251,269,283,293,313,317,347,353,373,383,419,

%U 421,431,439,443,457,467,487,491

%N Primes p such that 38 is a square mod p.

%H Vincenzo Librandi, <a href="/A038915/b038915.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[100]], JacobiSymbol[38, #] != -1 &] (* _Vincenzo Librandi_, Sep 07 2012 *)

%K nonn

%O 1,1

%A _N. J. A. Sloane_.