OFFSET
1,1
COMMENTS
Prime versus probable prime status and proofs are given in the author's table.
REFERENCES
C. Caldwell and H. Dubner, "Journal of Recreational Mathematics", Volume 28, No. 1, 1996-97, pp. 1-9.
LINKS
Patrick De Geest, PDP Reference Table - 383.
Makoto Kamada, Prime numbers of the form 388...883.
FORMULA
a(n) = A056256(n) + 2.
EXAMPLE
k=13 -> (35*10^(13-1) - 53)/9 = 3888888888883.
CROSSREFS
KEYWORD
nonn,base,hard,more
AUTHOR
Patrick De Geest, Apr 13 2003
EXTENSIONS
Edited by Ray Chandler, Nov 05 2014
STATUS
approved