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%I #20 Sep 08 2022 08:45:35
%S 101,193,239,331,607,653,883,929,1021,1297,1481,1619,1987,2309,2447,
%T 2539,2677,2861,2953,2999,3137,3229,3413,3643,3919,4057,4241,4517,
%U 4793,4931,5023,5437,5483,5851,5897,6173,6311,6449,6679,6863,7001,7369,7507,7691
%N Primes congruent to 9 mod 23.
%H Vincenzo Librandi, <a href="/A141913/b141913.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) ~ 22n log n. - _Charles R Greathouse IV_, Jul 03 2016
%t Select[Range[9,10000,23],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 05 2011 *)
%t Select[Prime[Range[1000]],Mod[#,23]==9&] (* _Harvey P. Dale_, Dec 14 2020 *)
%o (Magma) [p: p in PrimesUpTo(8000) | p mod 23 eq 9 ]; // _Vincenzo Librandi_, Aug 16 2012
%o (PARI) is(n)=isprime(n) && n%23==9 \\ _Charles R Greathouse IV_, Jul 03 2016
%Y Cf. A000040, A040984, A141908, A100201.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008
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