A141908 - OEIS

%I #19 Sep 08 2022 08:45:35

%S 2,71,163,347,439,577,761,853,991,1129,1451,1543,2003,2141,2371,2417,

%T 2647,2693,2969,3061,3613,3659,3797,3889,4027,4073,4211,4349,4441,

%U 4993,5039,5407,5591,5683,5821,5867,6143,6373,6833,6971,7109,7247,7477,7523,7753

%N Primes congruent to 2 mod 23.

%H Vincenzo Librandi, <a href="/A141908/b141908.txt">Table of n, a(n) for n = 1..1000</a>

%F {2} UNION A142344. - _R. J. Mathar_, Jul 20 2008

%t Select[Range[2,8000,23],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 05 2011 *)

%o (Magma) [p: p in PrimesUpTo(8000) | p mod 23 eq 2 ]; // _Vincenzo Librandi_, Aug 16 2012

%o (PARI) is(n)=isprime(n) && n%23==2 \\ _Charles R Greathouse IV_, Jul 01 2016

%Y Cf. A000040, A040984.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_, Jul 11 2008