A106080 Primes p such that 5*p+8 and 8*p+5 are primes.

3, 7, 13, 19, 43, 103, 127, 211, 223, 241, 283, 349, 397, 421, 439, 727, 733, 787, 829, 853, 883, 1597, 1723, 1741, 1777, 2017, 2131, 2287, 2371, 2383, 2521, 2593, 2833, 2857, 3163, 3181, 3253, 3319, 3571, 3583, 3697, 3853, 3919, 3967, 4003, 4021, 4201

Offset: 1

Author

Zak Seidov, May 07 2005

Keywords

• nonn

Programs

Magma

[p: p in PrimesUpTo(10000)| IsPrime(5*p+8) and IsPrime(8*p+5)] // Vincenzo Librandi, Nov 13 2010

Mathematica

Select[Prime[Range[220]], PrimeQ[8#+5]&&PrimeQ[5#+8]&]

Formula

A023220 INTERSECT A023230. - R. J. Mathar, Aug 06 2009

Extensions

More terms from Vincenzo Librandi, Apr 01 2010