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A040971
Primes p such that x^5 = 13 has no solution mod p.
2
11, 31, 41, 71, 101, 131, 151, 181, 191, 211, 241, 251, 281, 401, 421, 431, 491, 521, 541, 571, 631, 641, 661, 691, 701, 751, 811, 821, 881, 911, 941, 991, 1031, 1051, 1171, 1181, 1201, 1231, 1291, 1301, 1321
OFFSET
1,1
COMMENTS
Complement of A040970 relative to A000040. - Vincenzo Librandi, Sep 18 2012
LINKS
MATHEMATICA
ok[p_]:= Reduce[Mod[x^5 - 13, p] == 0, x, Integers] == False; Select[Prime[Range[300]], ok] (* Vincenzo Librandi, Sep 18 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(1500) | not exists{x : x in ResidueClassRing(p) | x^5 eq 13} ]; // Vincenzo Librandi, Sep 18 2012
CROSSREFS
Sequence in context: A374028 A374029 A153128 * A138656 A144234 A109548
KEYWORD
nonn,easy
STATUS
approved