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%I #6 Sep 20 2012 01:00:07
%S 5,7,11,13,23,29,31,37,41,47,53,61,71,79,101,103,109,127,131,149,151,
%T 157,167,173,181,191,197,199,211,223,229,239,263,269,271,277,281,293,
%U 311,317,331,349,359,367,373,383,389,397,401,421,431,439,461,463,479,487,491
%N Primes p such that x^10 = -2 has no solution mod p.
%C Complement of A051074 relative to A000040.
%H Vincenzo Librandi, <a href="/A216736/b216736.txt">Table of n, a(n) for n = 1..1000</a>
%t ok[p_] := Reduce[Mod[x^10 + 2, p] == 0, x, Integers] == False; Select[Prime[Range[100]], ok]
%Y Cf. A000040, A051074.
%K nonn,easy
%O 1,1
%A _Vincenzo Librandi_, Sep 15 2012