1,1

Also numbers n such that (73*10^n+53)/9 is prime.

There are no further terms < 2400. - Stefan Steinerberger (hansibal(AT)hotmail.com), Nov 06 2005

Makoto Kamada, Factorizations of 811...117.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(73*10^n + 53)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A056404 A056405 A009216 this_sequence A109228 A103162 A066006

Adjacent sequences: A103069 A103070 A103071 this_sequence A103073 A103074 A103075

nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005