A142220 Primes congruent to 23 mod 41.

23, 269, 433, 761, 1171, 1499, 1663, 2237, 2647, 2729, 3221, 3467, 3631, 3877, 4451, 4861, 4943, 5107, 5189, 5927, 6091, 6173, 6337, 6829, 6911, 7321, 7649, 8059, 8387, 9043, 9371, 9781, 10273, 10601, 10847, 11093, 11257, 11503, 11831, 12241, 12323, 12487

Offset

1,1

Links

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

Formula

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

Mathematica

Select[Prime[Range[5000]], MemberQ[{23}, Mod[#, 41]]&] (* Vincenzo Librandi, Aug 24 2012 *)
Select[Range[23, 13000, 41], PrimeQ] (* Harvey P. Dale, Aug 21 2016 *)

Prog

(Magma) [p: p in PrimesUpTo(17000) | p mod 41 eq 23 ]; // Vincenzo Librandi, Aug 24 2012
(PARI) is(n)=isprime(n) && n%41==23 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040.

Sequence in context: A140620 A002681 A240876 * A257930 A142027 A161523

Adjacent sequences: A142217 A142218 A142219 * A142221 A142222 A142223

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved