A141945 Primes congruent to 23 mod 25.

23, 73, 173, 223, 373, 523, 673, 773, 823, 1123, 1223, 1373, 1423, 1523, 1723, 1823, 1873, 1973, 2273, 2423, 2473, 3023, 3323, 3373, 3623, 3673, 3823, 3923, 4073, 4273, 4373, 4423, 4523, 4673, 4723, 4973, 5023, 5273, 5323, 5573, 5623, 5923, 6073, 6173, 6323

Offset: 1

Author

N. J. A. Sloane, Jul 11 2008

Keywords

• nonn
• easy

Comments

Primes with the last 2 decimal digits in {23, 73}. - Chai Wah Wu, Apr 29 2025

Links

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

Crossrefs

Cf. A000040, A014134.

Programs

Magma

[p: p in PrimesUpTo(8000) | p mod 25 eq 23 ]; // Vincenzo Librandi, Aug 16 2012

Maple

select(isprime, [seq(23+50*j, j=0..1000)]); # Robert Israel, Mar 17 2015

Mathematica

Select[Range[23, 20000, 25], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 15 2011 *)

PARI

is(n)=isprime(n) && n%25==23 \\ Charles R Greathouse IV, Jul 01 2016