1,2

Also numbers n such that (34*10^n+11)/9 is prime.

Makoto Kamada, Factorizations of 377...779.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(34*10^n + 11)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A055686 A126250 A109628 this_sequence A131599 A076384 A124648

Adjacent sequences: A102974 A102975 A102976 this_sequence A102978 A102979 A102980

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 17 2004