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A045416
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Primes congruent to {3, 5} mod 7.
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2
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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
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OFFSET
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1,1
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COMMENTS
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Primes p such that (1-x^7)/(1-x) is irreducible over GF(p). [Joerg Arndt, Aug 10 2011]
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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Select[Prime[Range[130]], Mod[#, 7]==3||Mod[#, 7]==5&] (* Harvey P. Dale, Jul 15 2011 *)
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PROG
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(MAGMA)[ p: p in PrimesUpTo(1000) | p mod 7 in {3, 5} ]; // Vincenzo Librandi, Aug 12 2012
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CROSSREFS
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Cf. A000040.
Sequence in context: A191051 A040129 A045415 * A038891 A287638 A119768
Adjacent sequences: A045413 A045414 A045415 * A045417 A045418 A045419
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane
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STATUS
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approved
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