%I #14 Sep 08 2022 08:45:35
%S 83,233,283,383,433,683,733,883,983,1033,1283,1433,1483,1583,1733,
%T 1783,1933,2083,2333,2383,2633,2683,2833,3083,3433,3533,3583,3733,
%U 3833,4133,4283,4483,4583,4733,4783,4933,5233,5333,5483,5683,5783,6133,6733,6833
%N Primes congruent to 8 mod 25.
%H Vincenzo Librandi, <a href="/A141933/b141933.txt">Table of n, a(n) for n = 1..1000</a>
%F a(n) ~ 20n log n. - _Charles R Greathouse IV_, Jul 02 2016
%t Select[Range[8, 20000, 25], PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Jun 18 2011 *)
%t Select[Prime[Range[900]],Mod[#,25]==8&] (* _Harvey P. Dale_, Aug 05 2022 *)
%o (Magma) [p: p in PrimesUpTo(8000) | p mod 25 eq 8 ]; // _Vincenzo Librandi_, Aug 16 2012
%o (PARI) is(n)=isprime(n) && n%25==8 \\ _Charles R Greathouse IV_, Jul 02 2016
%Y Cf. A000040.
%K nonn,easy
%O 1,1
%A _N. J. A. Sloane_, Jul 11 2008
|