OFFSET
1,1
LINKS
Paul Bourdelais, A Generalized Repunit Conjecture
J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
H. Dubner and T. Granlund, Primes of the Form (b^n+1)/(b+1), J. Integer Sequences, 3 (2000), #P00.2.7.
H. Lifchitz, Mersenne and Fermat primes field
PROG
(Prime95) PRP=1, 17, 348259, 1, 0, 0, "18"
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 15 2000
EXTENSIONS
a(8)=41221 corresponds to a probable prime discovered by Paul Bourdelais, Mar 18 2010
a(9)=113621 corresponds to a probable prime discovered by Paul Bourdelais, Sep 21 2011
a(10)=233689 corresponds to a probable prime discovered by Paul Bourdelais, Sep 03 2013
a(11)=348259 corresponds to a probable prime discovered by Paul Bourdelais, May 22 2014
STATUS
approved