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
KEYWORD
nonn,easy
AUTHOR
STATUS
approved