A038531 Primes that are concatenations of k-th prime and k-th composite.

79, 5927, 7333, 10139, 14951, 22769, 443117, 541133, 593143, 727169, 739171, 941207, 1103237, 1213253, 1367279, 1447291, 1511303, 1553309, 1667329, 2011381, 2129399, 2213411, 2237413, 2267417, 2287423, 2339429, 2609471

Offset: 1

Author

Vasiliy Danilov (danilovv(AT)usa.net), Jul 14 1998

Keywords

• nonn
• base

Crossrefs

Cf. A038532. Primes in A038530.

Extensions

Edited by Charles R Greathouse IV, Apr 28 2010