A142006 Primes congruent to 2 mod 31.

2, 157, 281, 467, 653, 839, 1087, 1459, 1583, 1831, 2017, 2141, 2203, 2389, 2699, 3257, 3319, 3691, 3877, 4001, 4373, 4621, 4931, 4993, 5179, 5303, 5737, 5861, 5923, 6047, 6481, 6791, 6977, 7039, 7349, 7411, 7907, 8093, 8527, 8713, 8837, 9209, 9643, 9767

Offset: 1

Author

N. J. A. Sloane, Jul 11 2008

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A000040, A141977, A142005.

Programs

Magma

[p: p in PrimesUpTo(12000) | p mod 31 eq 2 ]; // Vincenzo Librandi, Aug 17 2012

Mathematica

Select[Range[2,20000,31],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 07 2011 *)

PARI

select(n->n%31==2, primes(1000)) \\ Charles R Greathouse IV, Apr 28 2015

Formula

{2} UNION A142874. - R. J. Mathar, Jul 20 2008

a(n) ~ 30n log n. - Charles R Greathouse IV, Apr 28 2015