OFFSET
1,1
LINKS
Patrick De Geest, Home Primes
EXAMPLE
69 = 3*23 -> 323 = 17*19 -> 1719 = 3*3*191 and 33191 is prime.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jun 15 1998
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 28 2010
STATUS
approved