1,1

Also numbers n such that (43*10^n+11)/9 is prime.

Makoto Kamada, Factorizations of 477...779.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(43*10^n + 11)/9], Print[n]], {n, 0, 10000}]

Adjacent sequences: A102993 A102994 A102995 this_sequence A102997 A102998 A102999

Sequence in context: A091759 A032076 A088888 this_sequence A095182 A104465 A098515

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 17 2005