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A062641
Numbers k such that 75^k - 74^k is prime.
0
2, 3, 53, 101, 223, 1699
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(7) > 10^5. - Robert Price, Jun 29 2014
PROG
(PARI) is(n)=ispseudoprime(75^n-74^n) \\ Charles R Greathouse IV, Jun 13 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
STATUS
approved