A141963 - OEIS

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A141963

Primes congruent to 23 mod 27.

23, 131, 239, 293, 347, 401, 509, 563, 617, 887, 941, 1049, 1103, 1319, 1373, 1427, 1481, 1697, 1913, 2129, 2237, 2399, 2777, 2939, 3209, 3371, 3533, 3803, 3911, 4019, 4073, 4127, 4289, 4397, 4451, 4721, 4937, 5099, 5153, 5261, 5477, 5531, 5639, 5693, 5801

(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[Range[23, 30000, 27], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 21 2011 *)

PROG

(Magma) [p: p in PrimesUpTo(7000) | p mod 27 eq 23 ]; // Vincenzo Librandi, Aug 16 2012

(PARI) is(n)=isprime(n) && n%27==23 \\ Charles R Greathouse IV, Jul 02 2016