OFFSET
1,1
COMMENTS
Terms greater than 1000 may correspond to (unproven) strong pseudoprimes. [Clarified by M. F. Hasler, Sep 16 2013]
LINKS
Henri Lifchitz and Renaud Lifchitz, Top probable primes of the form 15^p-14^p
PROG
(PARI) is(n)=ispseudoprime(15^n-14^n) \\ Charles R Greathouse IV, Jun 12 2017
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(7) from Jean-Louis Charton, Mar 28 2011
STATUS
approved