OFFSET
1,1
EXAMPLE
If n=73 then 888n = 88873 (prime).
MATHEMATICA
Select[Range[1000], PrimeQ[FromDigits[Join[{8, 8, 8}, IntegerDigits[#]]]]&] (* Harvey P. Dale, Mar 28 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Sep 12 2005
EXTENSIONS
More terms from Vincenzo Librandi, Mar 27 2010
STATUS
approved