A213072 Smallest number whose decimal expansion is a concatenation of two primes in n different ways.

22, 237, 2337, 29397, 739397, 23932917, 1997771997, 79279391397

Offset

1,1

Comments

a(9) <= 4999363379397. - Donovan Johnson, Jun 17 2012

Links

Table of n, a(n) for n=1..8.

Example

a(3) = 2337 because 2337 is the smallest number that can be separated into two primes in three different ways: 2 and 337, 23 and 37, 233 and 7.

Crossrefs

Sequence in context: A003205 A037268 A091783 * A159649 A046499 A126903

Adjacent sequences: A213069 A213070 A213071 * A213073 A213074 A213075

Keyword

nonn,base

Author

Claudio Meller, Jun 04 2012

Extensions

a(5)-a(6) from David W. Wilson, Jun 04 2012

a(7)-a(8) from Donovan Johnson, Jun 16 2012

Status

approved