A141976 Primes congruent to 27 mod 28.

83, 139, 167, 223, 251, 307, 419, 503, 587, 643, 727, 811, 839, 1063, 1091, 1231, 1259, 1399, 1427, 1483, 1511, 1567, 1847, 1931, 1987, 2099, 2239, 2267, 2351, 2659, 2687, 2939, 3023, 3079, 3163, 3191, 3331, 3359, 3499, 3527, 3583, 3779, 3863, 3919, 3947

Offset

1,1

Links

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

Formula

a(n) ~ 12n log n. - Charles R Greathouse IV, Jul 02 2016

Mathematica

Select[Prime[Range[1500]], MemberQ[{27}, Mod[#, 28]]&] (* Vincenzo Librandi, Aug 17 2012 *)
Select[Range[27, 4000, 28], PrimeQ] (* Harvey P. Dale, May 14 2016 *)

Prog

(Magma) [p: p in PrimesUpTo(5000) | p mod 28 eq 27 ]; // Vincenzo Librandi, Aug 17 2012
(PARI) is(n)=isprime(n) && n%28==27 \\ Charles R Greathouse IV, Jul 02 2016

Crossrefs

Cf. A000040.

Sequence in context: A165502 A126711 A039548 * A142652 A256345 A140543

Adjacent sequences: A141973 A141974 A141975 * A141977 A141978 A141979

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved