login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A049588 Primes p such that x^56 = 2 has a solution mod p. 3
2, 7, 23, 31, 47, 73, 79, 89, 103, 151, 167, 191, 199, 223, 233, 257, 263, 271, 311, 359, 367, 383, 431, 439, 479, 487, 503, 599, 601, 607, 631, 647, 719, 727, 751, 823, 839, 863, 881, 887, 919, 937, 983, 991, 1031, 1039, 1063, 1087, 1103, 1151, 1217, 1223 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A059634 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^56 - 2, p] == 0, x, Integers] =!= False; Select[Prime[Range[200]], ok] (* Vincenzo Librandi, Sep 14 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(1300) | exists(t){x : x in ResidueClassRing(p) | x^56 eq 2}]; // Vincenzo Librandi, Sep 14 2012

CROSSREFS

Cf. A000040, A059634.

Sequence in context: A049584 A045382 A049560 * A106020 A248602 A045383

Adjacent sequences:  A049585 A049586 A049587 * A049589 A049590 A049591

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 28 01:20 EDT 2020. Contains 337388 sequences. (Running on oeis4.)