1,2

Makoto Kamada, Factorizations of 800...009.

Sabin Tabirca and Kieran Reynolds, Lacunary Primes.

Index entries for primes involving repunits.

Do[ If[ PrimeQ[ 8*10^n + 3], Print[ n ]], {n, 0, 10000}]

Sequence in context: A000423 A133933 A007335 this_sequence A079708 A096571 A081156

Adjacent sequences: A103067 A103068 A103069 this_sequence A103071 A103072 A103073

more,nonn

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