A244766 Prime numbers ending in the prime number 23.

23, 223, 523, 823, 1123, 1223, 1423, 1523, 1723, 1823, 2423, 3023, 3323, 3623, 3823, 3923, 4423, 4523, 4723, 5023, 5323, 5623, 5923, 6323, 6823, 7523, 7723, 7823, 8123, 8423, 8623, 8923, 9323, 9623, 9923, 10223, 10723, 11423, 11923, 12323, 12823, 12923

Offset: 1

Author

Vincenzo Librandi, Jul 06 2014

Keywords

• nonn
• base
• easy

Comments

Also primes of the form 100*n+23. Subsequence of A105854, A141945.

Links

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

Crossrefs

Cf. A105854, A141945.

Cf. similar sequences listed in A244763.

Programs

Magma

[n: n in PrimesUpTo(16000) | n mod 100 eq 23];

Mathematica

Select[Prime[Range[5, 6000]], Take[IntegerDigits[#], -2]=={2, 3} &]

PARI

select(x->(x % 100)==23, primes(2000)) \\ Michel Marcus, Jul 06 2014