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A142019
Primes congruent to 15 mod 31.
5
139, 263, 449, 821, 883, 1069, 1193, 1627, 1999, 2309, 2371, 2557, 3301, 3673, 3797, 4231, 4603, 4789, 5099, 5347, 5471, 5657, 5843, 6029, 6091, 6277, 6959, 7207, 7331, 7393, 7517, 7703, 7951, 8447, 8819, 9067, 9377, 9439, 9749, 9811, 10369, 11113, 11299
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[15, 20000, 31], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 20 2011 *)
PROG
(Magma) [ p: p in PrimesUpTo(30000) | p mod 31 eq 15 ]; // Vincenzo Librandi, Apr 20 2011
(PARI) is(n)=isprime(n) && n%31==15 \\ Charles R Greathouse IV, Jul 01 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved