OFFSET
1,1
EXAMPLE
The first concatenation of primes--23, 235, 2357, 235711, etc.--that is divisible by 19 concatenates through 271, and to get divisibility by 19^2 it's necessary to go through 1831.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
James G. Merickel, Feb 01 2011
STATUS
approved