A106091 Primes p such that 7*p + 12 and 12*p + 7 are primes.

5, 11, 13, 17, 23, 31, 43, 53, 61, 71, 73, 97, 107, 131, 167, 173, 181, 211, 227, 277, 307, 337, 383, 463, 503, 557, 601, 643, 701, 727, 811, 827, 877, 887, 907, 911, 937, 941, 997, 1013, 1031, 1051, 1091, 1097, 1193, 1201, 1223, 1231, 1277, 1303, 1361

Offset: 1

Author

Zak Seidov, May 07 2005

Keywords

• nonn

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..10000

Programs

Magma

[p: p in PrimesUpTo(5000)|IsPrime(7*p+12) and IsPrime(12*p+7)] // Vincenzo Librandi, Jan 30 2011

Mathematica

Select[Prime[Range[220]], PrimeQ[12#+7]&&PrimeQ[7#+12]&]