A141939 Primes congruent to 16 mod 25.

41, 191, 241, 491, 541, 641, 691, 941, 991, 1091, 1291, 1741, 2141, 2341, 2441, 2591, 2741, 2791, 3041, 3191, 3391, 3491, 3541, 3691, 4091, 4241, 4391, 4441, 4591, 4691, 5441, 5591, 5641, 5741, 5791, 6091, 6491, 6691, 6791, 6841, 6991, 7541, 7591, 7691

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) ~ 20n log n. - Charles R Greathouse IV, Jul 03 2016

Mathematica

Select[Range[16, 20000, 25], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 15 2011 *)
Select[Prime[Range[1000]], Mod[#, 25]==16&] (* Harvey P. Dale, Aug 04 2022 *)

Prog

(Magma) [p: p in PrimesUpTo(8000) | p mod 25 eq 16 ]; // Vincenzo Librandi, Aug 16 2012
(PARI) is(n)=isprime(n) && n%25==16 \\ Charles R Greathouse IV, Jul 03 2016

Crossrefs

Cf. A000040.

Sequence in context: A141922 A142080 A254228 * A264653 A297227 A089634

Adjacent sequences: A141936 A141937 A141938 * A141940 A141941 A141942

Keyword

nonn,easy

Author

N. J. A. Sloane, Jul 11 2008

Status

approved