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A040107 Primes p such that x^4 = 6 has a solution mod p. 2
2, 3, 5, 19, 23, 43, 47, 67, 71, 97, 139, 149, 163, 167, 173, 191, 211, 239, 241, 263, 283, 307, 311, 331, 359, 379, 383, 389, 409, 431, 457, 461, 479, 499, 503, 523, 547, 557, 571, 577, 599, 601, 619, 643, 647 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

ok [p_]:=Reduce[Mod[x^4- 6, p] == 0, x, Integers] =!= False;  Select[Prime[Range[200]], ok] (* Vincenzo Librandi, Sep 11 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(800) | exists(t){x : x in ResidueClassRing(p) | x^4 eq 6}]; // Vincenzo Librandi, Sep 11 2012

CROSSREFS

Sequence in context: A215320 A215357 A235639 * A254670 A348900 A161414

Adjacent sequences:  A040104 A040105 A040106 * A040108 A040109 A040110

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 21 09:39 EST 2022. Contains 350476 sequences. (Running on oeis4.)