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A062628
Numbers k such that 62^k - 61^k is prime.
0
17, 23, 421, 1303, 6163, 17117, 18439, 74521
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
All terms are primes. - Robert Price, May 07 2013
a(9) > 10^5. - Robert Price, May 07 2013
PROG
(PARI) is(n)=ispseudoprime(62^n-61^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(6)-a(8) (Computer runs by Adam Marciniec) from Robert Price, May 07 2013
STATUS
approved