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A062626
Numbers k such that 60^k - 59^k is prime.
0
4663, 8839, 14779
OFFSET
1,1
COMMENTS
Terms greater than 1000 often correspond only to strong pseudoprimes. [Clarified by M. F. Hasler, Sep 15 2013]
a(4) > 10^5. - Robert Price, Mar 01 2013
PROG
(PARI) is(n)=ispseudoprime(60^n-59^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard,bref
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(3) from Robert Price, Mar 01 2013
STATUS
approved