A141940 Primes congruent to 17 mod 25.

17, 67, 167, 317, 367, 467, 617, 967, 1117, 1217, 1367, 1567, 1667, 1867, 2017, 2267, 2417, 2467, 2617, 2767, 2917, 3067, 3167, 3217, 3467, 3517, 3617, 3767, 3917, 3967, 4217, 4517, 4567, 4817, 4967, 5167, 5417, 5717, 5867, 6067, 6217, 6317, 6367, 6917

Offset: 1

Author

N. J. A. Sloane, Jul 11 2008

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A000040.

Programs

Magma

[p: p in PrimesUpTo(8000) | p mod 25 eq 17 ]; // Vincenzo Librandi, Aug 16 2012

Mathematica

Select[Prime[Range[1000]],Mod[#,25]==17&]  (* Harvey P. Dale, Jan 08 2011 *)

PARI

is(n)=isprime(n) && n%25==17 \\ Charles R Greathouse IV, Jul 02 2016

Formula

a(n) ~ 20n log n. - Charles R Greathouse IV, Jul 02 2016