A141949 Primes congruent to 2 mod 27.

2, 29, 83, 137, 191, 353, 461, 569, 677, 839, 947, 1109, 1163, 1217, 1433, 1487, 1811, 1973, 2027, 2081, 2243, 2297, 2351, 2459, 2621, 2729, 2837, 2999, 3323, 3539, 3593, 3701, 3863, 3917, 4079, 4133, 4241, 4349, 4457, 4673, 4889, 4943, 5051, 5483, 5591

Offset: 1

Author

N. J. A. Sloane, Jul 11 2008

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A000040.

Programs

Magma

[ p: p in PrimesUpTo(8000) | p mod 27 eq 2 ]; // Vincenzo Librandi, Apr 19 2011

Mathematica

Select[Prime[Range[900]],Mod[#,27]==2&]  (* Harvey P. Dale, Apr 18 2011 *)

PARI

is(n)=isprime(n) && n%27==2 \\ Charles R Greathouse IV, Jul 03 2016

Formula

{2} UNION A142592. - R. J. Mathar, Jul 20 2008

a(n) ~ 18n log n. - Charles R Greathouse IV, Jul 03 2016