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A062646
Numbers k such that 80^k - 79^k is prime.
0
OFFSET
1,1
COMMENTS
Terms > 1000 are often only strong pseudoprimes.
a(4) > 10^5. - Robert Price, Dec 12 2014
PROG
(PARI) is(n)=ispseudoprime(80^n-79^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard,bref
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
STATUS
approved