OFFSET
1,1
COMMENTS
Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011
LINKS
EXAMPLE
k=27 -> (97*10^27 - 79)/99 = 979797979797979797979797979.
MATHEMATICA
Select[Range[1, 239, 2], PrimeQ[FromDigits[PadRight[{}, #, {9, 7}]]]&] (* Harvey P. Dale, Mar 24 2021 *)
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001
EXTENSIONS
Edited by Ray Chandler, Aug 17 2011
STATUS
approved