A049558 Primes p such that x^26 = 2 has a solution mod p.

2, 7, 17, 23, 31, 41, 47, 71, 73, 89, 97, 103, 113, 127, 137, 151, 167, 191, 193, 199, 223, 233, 239, 241, 257, 263, 271, 281, 311, 337, 353, 359, 367, 383, 401, 409, 431, 433, 439, 449, 457, 463, 479, 487, 503, 569, 577, 593, 601, 607, 617, 631, 641, 647

Offset

1,1

Comments

Complement of A059314 relative to A000040. - Vincenzo Librandi, Sep 14 2012

Links

R. J. Mathar, Table of n, a(n) for n = 1..1000

Index entries for related sequences

Mathematica

ok[p_]:= Reduce[Mod[x^26 - 2, p] == 0, x, Integers] =!= False; Select[Prime[Range[150]], ok] (* Vincenzo Librandi, Sep 14 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(700) | exists(t){x : x in ResidueClassRing(p) | x^26 eq 2}]; // Vincenzo Librandi, Sep 14 2012

Crossrefs

Cf. A000040, A059314.

Sequence in context: A049590 A049570 A049566 * A049546 A049578 A162574

Adjacent sequences: A049555 A049556 A049557 * A049559 A049560 A049561

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved