%I
%S 7,13,19,37,61,67,73,79,97,103,137,139,151,163,181,193,199,211,239,
%T 241,271,307,313,331,337,349,367,373,379,409,421,443,463,487,523,541,
%U 547,571,577,607,613,619,631,647,661,673,709,751,757,769,787,823,829,853
%N Primes p such that x^51 = 2 has no solution mod p.
%C Complement of A049583 relative to A000040.
%H Vincenzo Librandi, <a href="/A059640/b059640.txt">Table of n, a(n) for n = 1..1000</a>
%t ok[p_] := Reduce[Mod[x^51  2, p] == 0, x, Integers] == False; Select[Prime[Range[200]], ok] (* _Vincenzo Librandi_, Sep 21 2012 *)
%o (MAGMA) [p: p in PrimesUpTo(900)  not exists{x: x in ResidueClassRing(p)  x^51 eq 2}]; // _Vincenzo Librandi_, Sep 21 2012
%Y Cf. A000040, A049583.
%K nonn,easy
%O 1,1
%A _Klaus Brockhaus_, Feb 02 2001
