A141975 Primes congruent to 25 mod 28.

53, 109, 137, 193, 277, 389, 557, 613, 641, 809, 977, 1033, 1061, 1117, 1201, 1229, 1453, 1481, 1621, 1733, 1789, 1873, 1901, 2069, 2153, 2237, 2293, 2377, 2657, 2713, 2741, 2797, 2909, 3049, 3217, 3301, 3329, 3413, 3469, 3581, 3637, 3833, 3889, 3917, 4001

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 03 2016

Mathematica

Select[Prime[Range[1500]], MemberQ[{25}, Mod[#, 28]]&] (* Vincenzo Librandi, Aug 17 2012 *)

Prog

(Magma) [p: p in PrimesUpTo(5000) | p mod 28 eq 25 ]; // Vincenzo Librandi, Aug 17 2012
(PARI) is(n)=isprime(n) && n%28==25 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A338836 A061656 A141965 * A142663 A229960 A107155

Adjacent sequences: A141972 A141973 A141974 * A141976 A141977 A141978

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved