1,1

(28^1031+1)/29, a 1491-digit number, has now been certified prime with Primo.

H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.

Cf. A071380, A071382.

Adjacent sequences: A071378 A071379 A071380 this_sequence A071382 A071383 A071384

Sequence in context: A136171 A102586 A132876 this_sequence A041951 A143762 A079281

nonn

Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 22 2002