A032627 Primes that are concatenations of n with n + 4.

37, 59, 1721, 2731, 3539, 3943, 4549, 4751, 6367, 6569, 8387, 9397, 99103, 113117, 123127, 147151, 149153, 173177, 185189, 203207, 209213, 213217, 219223, 227231, 239243, 249253, 255259, 263267, 267271, 285289, 287291

Offset: 1

Author

Patrick De Geest, May 15 1998

Keywords

• nonn
• base

Crossrefs

Cf. A032609, A032619.

Extensions

Edited by Charles R Greathouse IV, Apr 28 2010