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A040992 Primes p such that x^6 = 2 has a solution mod p. 6
2, 17, 23, 31, 41, 47, 71, 89, 113, 127, 137, 167, 191, 223, 233, 239, 257, 263, 281, 311, 353, 359, 383, 401, 431, 433, 439, 449, 457, 479, 503, 521, 569, 593, 599, 601, 617, 641, 647, 719, 727, 743, 761, 809, 839, 857, 863, 881, 887, 911, 919, 929, 953 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A040993 relative to A000040. - Vincenzo Librandi, Sep 13 2012

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

Index entries for related sequences

MATHEMATICA

ok[p_]:= Reduce[Mod[x^6- 2, p] == 0, x, Integers]=!=False; Select[Prime[Range[200]], ok] (* Vincenzo Librandi, Sep 13 2012 *)

PROG

(PARI) forprime(p=2, 2000, if([]~!=polrootsmod(x^6-2, p), print1(p, ", "))); print();

/* Joerg Arndt, Jul 27 2011 */

(MAGMA) [p: p in PrimesUpTo(1000) | exists(t){x : x in ResidueClassRing(p) | x^6 eq 2}]; // Vincenzo Librandi, Sep 13 2012

CROSSREFS

Cf. A000040, A040993.

Sequence in context: A006029 A126961 A106622 * A049550 A049574 A018643

Adjacent sequences:  A040989 A040990 A040991 * A040993 A040994 A040995

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 24 19:08 EDT 2014. Contains 240988 sequences.