1,2

Also numbers n such that (37*10^n+53)/9 is prime.

Makoto Kamada, Factorizations of 411...117.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(37*10^n + 53)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A056410 A056400 A119514 this_sequence A069441 A006344 A053352

Adjacent sequences: A102979 A102980 A102981 this_sequence A102983 A102984 A102985

more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 21 2004