1,1

Also numbers n such that (62*10^n+1)/9 is prime.

Makoto Kamada, Factorizations of 688...889.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(62*10^n + 1)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A163793 A076455 A000362 this_sequence A107339 A139260 A114466

Adjacent sequences: A103044 A103045 A103046 this_sequence A103048 A103049 A103050

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 18 2005