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A045416 Primes congruent to {3, 5} mod 7. 2
3, 5, 17, 19, 31, 47, 59, 61, 73, 89, 101, 103, 131, 157, 173, 199, 227, 229, 241, 257, 269, 271, 283, 311, 313, 353, 367, 383, 397, 409, 439, 467, 479, 509, 521, 523, 563, 577, 593, 607, 619, 647, 661, 677, 691 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes p such that (1-x^7)/(1-x) is irreducible over GF(p). [Joerg Arndt, Aug 10 2011]

LINKS

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

MATHEMATICA

Select[Prime[Range[130]], Mod[#, 7]==3||Mod[#, 7]==5&] (* Harvey P. Dale, Jul 15 2011 *)

PROG

(MAGMA)[ p: p in PrimesUpTo(1000) | p mod 7 in {3, 5} ]; // Vincenzo Librandi, Aug 12 2012

CROSSREFS

Cf. A000040.

Sequence in context: A191051 A040129 A045415 * A038891 A287638 A119768

Adjacent sequences:  A045413 A045414 A045415 * A045417 A045418 A045419

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified June 27 16:27 EDT 2022. Contains 354896 sequences. (Running on oeis4.)