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A051083
Primes p such that x^28 = -2 has a solution mod p.
2
2, 3, 11, 19, 59, 67, 73, 83, 89, 107, 131, 139, 163, 179, 227, 233, 251, 257, 283, 307, 331, 347, 353, 419, 443, 467, 499, 523, 563, 571, 577, 587, 593, 601, 619, 643, 683, 691, 739, 787, 811, 859, 881, 907, 937, 947, 971, 1019, 1033, 1049, 1091, 1097, 1123, 1153, 1163, 1171, 1187
OFFSET
1,1
COMMENTS
Complement of A216745 relative to A000040. - Vincenzo Librandi, Sep 17 2012
LINKS
MATHEMATICA
ok[p_]:= Reduce[Mod[x^28 + 2, p] == 0, x, Integers] =!= False; Select[Prime[Range[500]], ok] (* Vincenzo Librandi, Sep 15 2012 *)
PROG
(PARI) /* see A051071 */
(Magma) [p: p in PrimesUpTo(1200) | exists(t){x : x in ResidueClassRing(p) | x^28 eq - 2}]; // Vincenzo Librandi, Sep 15 2012
CROSSREFS
Sequence in context: A045339 A051091 A085902 * A051097 A214773 A235618
KEYWORD
nonn,easy
EXTENSIONS
More terms from Joerg Arndt, Jul 27 2011
STATUS
approved