A244770 Prime numbers ending in the prime number 47.

47, 347, 547, 647, 947, 1447, 1747, 1847, 2347, 2447, 2647, 3347, 3547, 3847, 3947, 4447, 4547, 5147, 5347, 5647, 6047, 6247, 6547, 6947, 7247, 7547, 8147, 8447, 8647, 8747, 9547, 10247, 10847, 11047, 11447, 12347, 12547, 12647, 13147, 14347, 14447, 14747

Offset: 1

Author

Vincenzo Librandi, Jul 06 2014

Keywords

• nonn
• base
• easy

Comments

Also primes of the form 100*n+47. Subsequence A141882, A141944.

Links

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

Crossrefs

Cf. A141882, A141944.

Cf. similar sequences listed in A244763.

Programs

Magma

[n: n in PrimesUpTo(16000) | n mod 100 eq 47];

Mathematica

Select[Prime[Range[5, 6000]], Take[IntegerDigits[#], -2]=={4, 7} &]

PARI

select(x->(x % 100)==47, primes(2000)) \\ Michel Marcus, Jul 06 2014