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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
OFFSET
1,1
COMMENTS
Primes p such that (1-x^7)/(1-x) is irreducible over GF(p). [Joerg Arndt, Aug 10 2011]
LINKS
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
KEYWORD
nonn,easy
STATUS
approved