OFFSET
1,1
COMMENTS
Primes of the form (8*10^k + 1)/9. - Vincenzo Librandi, Jul 17 2012
LINKS
MATHEMATICA
Select[Table[(8*10^n+1)/9, {n, 1, 200}], PrimeQ] (* Vincenzo Librandi, Jul 17 2012 *)
Select[Table[FromDigits[PadLeft[{9}, n, 8]], {n, 100}], PrimeQ] (* Harvey P. Dale, Dec 15 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Rick L. Shepherd, Mar 28 2004
STATUS
approved