1,2

Also numbers n such that (62*10^n-17)/9 is prime.

Makoto Kamada, Factorizations of 688...887.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(62*10^n - 17)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A044135 A044516 A015722 this_sequence A063868 A049012 A137187

Adjacent sequences: A103043 A103044 A103045 this_sequence A103047 A103048 A103049

more,nonn

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