A141967 Primes congruent to 5 mod 28.

5, 61, 89, 173, 229, 257, 313, 397, 509, 593, 677, 733, 761, 929, 1013, 1069, 1097, 1153, 1181, 1237, 1321, 1433, 1489, 1601, 1657, 1741, 1993, 2161, 2273, 2357, 2441, 2609, 2693, 2749, 2777, 2833, 2861, 2917, 3001, 3169, 3253, 3449, 3533, 3617, 3673, 3701

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[2000]], MemberQ[{5}, Mod[#, 28]]&] (* Vincenzo Librandi, Aug 17 2012 *)
Select[Range[5, 4000, 28], PrimeQ] (* Harvey P. Dale, Dec 31 2021 *)

Prog

(Magma) [p: p in PrimesUpTo(5000) | p mod 28 eq 5 ]; // Vincenzo Librandi, Aug 17 2012
(PARI) is(n)=isprime(n) && n%28==5 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A162129 A326726 A367337 * A139915 A174053 A107191

Adjacent sequences: A141964 A141965 A141966 * A141968 A141969 A141970

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved