1,1

Also numbers n such that (89*10^n-53)/9 is prime.

Makoto Kamada, Factorizations of 988...883.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[(89*10^n - 53)/9], Print[n]], {n, 0, 10000}]

Sequence in context: A032815 A176894 A041053 this_sequence A107124 A141049 A052830

Adjacent sequences: A103105 A103106 A103107 this_sequence A103109 A103110 A103111

more,nonn

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