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A213072 Smallest number whose decimal expansion is a concatenation of two primes in n different ways. 1
22, 237, 2337, 29397, 739397, 23932917, 1997771997, 79279391397 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 4 02:16 EST 2022. Contains 358544 sequences. (Running on oeis4.)