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A040981 Primes p such that x^5 = 18 has no solution mod p. 2
11, 31, 41, 61, 71, 101, 151, 181, 191, 211, 241, 251, 271, 281, 331, 401, 421, 461, 491, 541, 571, 641, 661, 691, 701, 751, 761, 811, 821, 881, 911, 941, 971, 1021, 1031, 1051, 1091, 1151, 1171, 1181, 1201, 1231, 1301, 1361, 1471 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Complement of A040980 relative to A000040. - Vincenzo Librandi, Sep 19 2012
LINKS
MATHEMATICA
ok[p_]:= Reduce[Mod[x^5 - 18, p] == 0, x, Integers] == False; Select[Prime[Range[300]], ok] (* Vincenzo Librandi, Sep 19 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(1500) | not exists{x : x in ResidueClassRing(p) | x^5 eq 18} ]; // Vincenzo Librandi, Sep 19 2012
CROSSREFS
Sequence in context: A188384 A040172 A040160 * A181603 A040983 A040979
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified December 7 17:41 EST 2023. Contains 367659 sequences. (Running on oeis4.)