A141909 Primes congruent to 4 mod 23.

73, 211, 257, 349, 487, 809, 947, 1039, 1223, 1361, 1453, 1499, 1637, 1867, 1913, 2143, 2281, 2557, 2741, 2833, 2879, 2971, 3109, 4259, 4397, 4673, 4903, 5087, 5179, 5501, 5639, 5869, 6007, 6053, 6329, 6421, 7019, 7433, 8123, 8353, 8537, 8629, 8951, 9043

Offset: 1

Author

N. J. A. Sloane, Jul 11 2008

Keywords

• nonn
• easy

Comments

Primes congruent to 27 mod 46. - Chai Wah Wu, Apr 28 2025

Links

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

Crossrefs

Cf. A000040, A040984, A141908, A100201.

Programs

Magma

[p: p in PrimesUpTo(10000) | p mod 23 eq 4 ]; // Vincenzo Librandi, Aug 16 2012

Mathematica

Select[Range[4,10000,23],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 05 2011 *)

PARI

is(n)=isprime(n) && n%23==4 \\ Charles R Greathouse IV, Jul 03 2016

Formula

a(n) ~ 22n log n. - Charles R Greathouse IV, Jul 03 2016