A235148 Primes p such that (p reversed) + 5 is also a prime.

2, 23, 29, 41, 47, 83, 89, 227, 233, 239, 251, 257, 263, 269, 293, 401, 419, 431, 443, 467, 491, 641, 647, 827, 863, 881, 2027, 2063, 2099, 2111, 2153, 2207, 2273, 2297, 2339, 2357, 2441, 2459, 2543, 2609, 2687, 2693, 2699, 2729, 2801, 2819, 2879, 2927, 2939, 2963

Offset: 1

Author

Vincenzo Librandi, Jan 04 2014

Keywords

• nonn
• base

Examples

			47 is in the sequence because 74+5=79 is prime.
		

Links

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

Crossrefs

Cf. A165446, A166501, A167460, A167466, A167473.

Programs

Magma

[p: p in PrimesUpTo(6000) | IsPrime(q + 5) where q is Seqint(Reverse(Intseq(p)))];

Mathematica

Select[Prime[Range[6000]], PrimeQ[FromDigits[Reverse[IntegerDigits[#]]] + 5]&]