login
A062582
Numbers k such that 16^k - 15^k is prime.
1
2, 43, 211, 1523, 1579, 1693, 12281, 24889
OFFSET
1,1
COMMENTS
Terms greater than 1000 may correspond to (unproven) strong pseudoprimes.
No other terms less than 100000. - Robert Price, Apr 15 2012
PROG
(PARI) is(n)=ispseudoprime(16^n-15^n) \\ Charles R Greathouse IV, Jun 12 2017
KEYWORD
nonn,hard,more
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(7) (found by Mike Oakes in August 2003) and a(8) (found by Jean-Louis Charton in December 2010) from Jean-Louis Charton, Mar 19 2011
Edited by M. F. Hasler, Sep 16 2013
STATUS
approved