

A228533


Smallest primes of 2n or more digits such that the number formed from first n digits is same as the number formed from last n digits.


2



11, 11311, 1074107, 100111001, 10001610001, 1000017100001, 100000321000003, 10000001910000001, 1000000118100000011, 100000000381000000003, 10000000001710000000001, 1000000000016100000000001, 100000000000131000000000001, 10000000000003610000000000003
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OFFSET

1,1


LINKS



EXAMPLE

a(3) = 1074107 because the number formed from first 3 digits, that is, 107 is same as the number formed from last 3 digits and 1074107 is the smallest such prime.


CROSSREFS



KEYWORD

nonn,base


AUTHOR



STATUS

approved



