A142173 - OEIS

A142173

Primes congruent to 23 mod 39.

23, 101, 179, 257, 491, 569, 647, 881, 1193, 1427, 1583, 1973, 2129, 2207, 2441, 2753, 2909, 3221, 3299, 3533, 3767, 3923, 4001, 4079, 4157, 4391, 4547, 4703, 4937, 5171, 5483, 5639, 5717, 6029, 6263, 6653, 7043, 7121, 7433, 7589, 7823, 7901, 8291, 8369

(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) ~ 24n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Prime[Range[3000]], MemberQ[{23}, Mod[#, 39]]&] (* Vincenzo Librandi, Aug 20 2012 *)

PROG

(Magma) [p: p in PrimesUpTo(10000) | p mod 39 eq 23 ]; // Vincenzo Librandi, Aug 20 2012

(PARI) is(n)=isprime(n) && n%39==23 \\ Charles R Greathouse IV, Jul 02 2016