login
A062630
Numbers k such that 64^k - 63^k is prime.
0
2, 3, 11, 31, 349, 379, 14669, 19001, 49957, 68909
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(11) > 10^5. - Robert Price, Jul 08 2013
PROG
(PARI) is(n)=ispseudoprime(64^n-63^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(7)-a(10) from Robert Price, Jul 08 2013
STATUS
approved