A142237 Primes congruent to 40 mod 41.

163, 409, 491, 983, 1229, 1721, 2131, 2213, 2377, 2459, 3361, 3607, 3853, 4099, 4591, 4673, 4919, 5657, 5821, 5903, 6067, 7297, 7789, 8117, 8363, 8527, 8609, 9511, 9839, 10331, 10987, 11069, 11807, 11971, 12791, 13037, 13693, 14431, 14759, 14923, 15497

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.

Programs

Magma

[p: p in PrimesUpTo(17000) | p mod 41 eq 40 ]; // Vincenzo Librandi, Aug 24 2012

Mathematica

Select[Prime[Range[5000]],MemberQ[{40},Mod[#,41]]&] (* Vincenzo Librandi, Aug 24 2012 *)
Select[Range[40,16000,41],PrimeQ] (* Harvey P. Dale, Oct 11 2012 *)

PARI

is(n)=isprime(n) && n%41==40 \\ Charles R Greathouse IV, Jul 02 2016

Formula

a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 02 2016