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

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

Crossrefs

Cf. A000040.

Sequence in context: A231453 A142132 A140375 * A225584 A214092 A139976

Adjacent sequences: A142170 A142171 A142172 * A142174 A142175 A142176

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved