A083470 Smallest prime which is the concatenation of n distinct primes in increasing order.

2, 23, 257, 2357, 235723, 23571143, 2357111371, 235711131767, 23571113172367, 2357111317192343, 235711131719233171, 23571113171923296797, 2357111317192329314189, 235711131719232931375979, 23571113171923293137414371, 2357111317192329313741436167

Offset: 1

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003

Keywords

• base
• nonn

Comments

Perhaps the n-th term begins with the concatenation of the first (n-1) primes, except for n = 3.

The 9th, 11th, 12th, 13th, .... terms are other counterexamples to the above "conjecture". On the other hand, it seems almost sure that the n-th term starts with the concatenation of the first (n-2) primes. - M. F. Hasler, Mar 20 2011

Crossrefs

Cf. A069837, A083427.

Extensions

More terms from David Wasserman, Nov 02 2004