OFFSET
0,4
EXAMPLE
The numbers 11, 13, 17, 19, 113, 1117, 11113, 11117, 11119, 111119, ... are primes.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Pierre CAMI, Nov 10 2004
EXTENSIONS
Edited by Don Reble, Nov 07 2005
STATUS
approved