OFFSET
1,1
EXAMPLE
Greatest prime divisor of 27795302832777615 which is a concatenation of first four terms 2,7,795302832777615 is prime(3) = 5, 27795302832777615= 3^33*5.
CROSSREFS
KEYWORD
base,more,nonn,bref
AUTHOR
Amarnath Murthy, Jun 10 2004
STATUS
approved