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A040999
Primes p such that x^6 = 5 has no solution mod p.
2
3, 7, 13, 17, 19, 23, 31, 37, 43, 47, 53, 61, 67, 73, 79, 83, 97, 103, 107, 109, 113, 127, 137, 139, 151, 157, 163, 167, 173, 193, 197, 223, 227, 229, 233, 257, 263, 271, 277, 283, 293, 307, 313, 317, 331, 337, 347, 349, 353, 367, 373, 383, 397
OFFSET
1,1
COMMENTS
Complement of A040998 relative to A000040. - Vincenzo Librandi, Sep 19 2012
LINKS
MATHEMATICA
ok[p_]:= Reduce[Mod[x^6 - 5, p] == 0, x, Integers] == False; Select[Prime[Range[100]], ok] (* Vincenzo Librandi, Sep 19 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(500) | not exists{x : x in ResidueClassRing(p) | x^6 eq 5} ]; // Vincenzo Librandi, Sep 19 2012
CROSSREFS
Sequence in context: A363636 A100807 A290400 * A172240 A129901 A067073
KEYWORD
nonn,easy
STATUS
approved