A141911 - OEIS

%I #18 Sep 08 2022 08:45:35

%S 7,53,191,283,421,467,743,881,1019,1249,1433,1571,1663,1709,1801,1847,

%T 2399,2767,3089,3181,3319,3457,3733,3779,3917,4423,4561,5021,5113,

%U 5297,5527,5573,5711,5849,5987,6079,6217,6263,6907,7229,7321,7459,7643,7873,7919

%N Primes congruent to 7 mod 23.

%H Vincenzo Librandi, <a href="/A141911/b141911.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[7,10000,23],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Apr 05 2011 *)

%o (Magma) [p: p in PrimesUpTo(8000) | p mod 23 eq 7 ]; // _Vincenzo Librandi_, Aug 16 2012

%o (PARI) is(n)=isprime(n) && n%23==7 \\ _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