%I #12 Sep 08 2022 08:45:35
%S 43,89,181,227,457,503,641,733,1009,1193,1423,1607,1699,2113,2251,
%T 2297,2389,2711,2803,3079,3217,3539,3631,3677,3769,3907,4091,4229,
%U 4597,4643,4919,5011,5333,5471,5563,5701,5839,6299,6529,7127,7219,7541,7817,8093
%N Primes congruent to 20 mod 23.
%H Vincenzo Librandi, <a href="/A141924/b141924.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) ~ 22n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t Select[Range[20,20000,23],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, May 18 2011 *)
%o (Magma) [p: p in PrimesUpTo(9000) | p mod 23 eq 20 ]; // _Vincenzo Librandi_, Aug 16 2012
%o (PARI) is(n)=isprime(n) && n%23==20 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y Cf. A000040, A141925, A141926.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008