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A216690
Primes p such that x^4 = -2 has no solution mod p.
2
5, 7, 13, 17, 23, 29, 31, 37, 41, 47, 53, 61, 71, 79, 97, 101, 103, 109, 127, 137, 149, 151, 157, 167, 173, 181, 191, 193, 197, 199, 223, 229, 239, 241, 263, 269, 271, 277, 293, 311, 313, 317, 349, 359, 367, 373, 383, 389, 397
OFFSET
1,1
COMMENTS
Complement of A051071 relative to A000040.
LINKS
MATHEMATICA
ok[p_]:= Reduce[Mod[x^4 + 2, p] == 0, x, Integers] == False; Select[Prime[Range[100]], ok]
CROSSREFS
Sequence in context: A216739 A216735 A216771 * A095283 A317543 A253297
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Sep 15 2012
STATUS
approved