1,2

Also numbers n such that (44*10^n-71)/9 is prime.

Makoto Kamada, Factorizations of 488...881.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(44*10^n - 71)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A140905 A025038 A028684 this_sequence A139662 A140030 A020371

Adjacent sequences: A102994 A102995 A102996 this_sequence A102998 A102999 A103000

bref,more,nonn

Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 17 2005