A141948 - OEIS

A141948

Primes congruent to 1 mod 27.

109, 163, 271, 379, 433, 487, 541, 757, 811, 919, 1297, 1459, 1567, 1621, 1783, 1999, 2053, 2161, 2269, 2377, 2539, 2593, 2647, 2917, 2971, 3079, 3187, 3457, 3511, 3673, 3727, 3889, 3943, 4051, 4159, 4483, 4591, 4861, 4969, 5023, 5077, 5347, 5563, 5779

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

FORMULA

a(n) ~ 18n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Prime[Range[800]], MemberQ[{1}, Mod[#, 27]] &] (* Vincenzo Librandi, Aug 16 2012 *)

Select[Range[1, 6000, 27], PrimeQ] (* Harvey P. Dale, Jan 16 2023 *)

PROG

(Magma) [p: p in PrimesUpTo(7000) | p mod 27 eq 1 ]; // Vincenzo Librandi, Aug 16 2012