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!)
A040162 Primes p such that x^5 = 3 has no solution mod p. 2
11, 31, 61, 71, 101, 131, 151, 181, 191, 211, 241, 251, 271, 281, 311, 331, 401, 421, 461, 521, 541, 571, 601, 631, 641, 691, 701, 751, 811, 821, 881, 911, 941, 971, 991, 1031, 1061, 1151, 1181, 1201, 1231, 1291, 1301, 1321, 1361, 1381, 1451, 1481, 1531 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A040161 relative to A000040. - Vincenzo Librandi, Sep 18 2012

LINKS

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

MATHEMATICA

ok[p_]:= Reduce[Mod[x^5 - 3, p] == 0, x, Integers] == False; Select[Prime[Range[300]], ok] (* Vincenzo Librandi, Sep 18 2012  *)

PROG

(MAGMA) [ p: p in PrimesUpTo(1600) | forall(t){x : x in ResidueClassRing(p) | x^5 ne 3} ]; // Klaus Brockhaus, Jun 03 2009

(MAGMA) [p: p in PrimesUpTo(1550) | not exists{x : x in ResidueClassRing(p) | x^5 eq 3} ]; // Vincenzo Librandi, Sep 18 2012

CROSSREFS

Cf. A040161 (primes p such that x^5 = 3 has a solution mod p).

Sequence in context: A028877 A087394 A196117 * A113747 A202007 A125239

Adjacent sequences:  A040159 A040160 A040161 * A040163 A040164 A040165

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Klaus Brockhaus, Jun 03 2009

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 23 08:18 EDT 2020. Contains 337295 sequences. (Running on oeis4.)