A142617 Primes congruent to 23 mod 55.

23, 353, 463, 683, 1013, 1123, 1453, 1783, 2003, 2113, 2333, 2663, 3323, 3433, 4093, 4423, 4643, 4973, 5303, 5413, 5743, 6073, 6733, 7283, 7393, 7723, 8053, 8273, 8713, 8933, 9043, 9923, 10253, 11243, 11353, 11903, 12343, 12893, 13003, 13553, 13883, 14323

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 03 2016

Mathematica

Select[Range[23, 15000, 55], PrimeQ] (* Harvey P. Dale, Apr 22 2012 *)
Select[Prime[Range[2500]], MemberQ[{23}, Mod[#, 55]] &] (* Vincenzo Librandi, Aug 31 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(16000) | p mod 55 eq 23]; // Vincenzo Librandi, Aug 31 2012
(PARI) is(n)=isprime(n) && n%55==23 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A022469 A028030 A022454 * A025949 A025969 A020579

Adjacent sequences: A142614 A142615 A142616 * A142618 A142619 A142620

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved