OFFSET
1,1
COMMENTS
The next term has 168 digits. - Charles R Greathouse IV, Sep 29 2008
EXAMPLE
3, 31, 313, 313111111111111111, ... are all prime.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Aug 13 2005
EXTENSIONS
a(6)-a(9) from_Charles R Greathouse IV_, Sep 29 2008
STATUS
approved