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A040975 Primes p such that x^5 = 15 has no solution mod p. 2
11, 31, 41, 61, 71, 101, 131, 151, 181, 191, 251, 271, 281, 331, 401, 421, 431, 461, 491, 521, 571, 601, 631, 641, 661, 691, 701, 751, 821, 881, 971, 991, 1021, 1051, 1061, 1171, 1181, 1231, 1291, 1301, 1321 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A040974 relative to A000040. - Vincenzo Librandi, Sep 18 2012

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

ok[p_]:= Reduce[Mod[x^5 - 15, 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 15} ]; // Vincenzo Librandi, Sep 18 2012

CROSSREFS

Sequence in context: A327346 A030430 A059313 * A188384 A040172 A040160

Adjacent sequences:  A040972 A040973 A040974 * A040976 A040977 A040978

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 20 21:32 EDT 2020. Contains 337910 sequences. (Running on oeis4.)