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A062604
Numbers k such that 38^k - 37^k is prime.
1
3, 379, 383, 1373, 1609, 24611, 38281
OFFSET
1,1
COMMENTS
Terms greater than 1000 are often only strong pseudoprimes.
a(8) > 10^5. - Robert Price, Sep 03 2012
PROG
(PARI) is(n)=ispseudoprime(38^n-37^n) \\ Charles R Greathouse IV, Jun 12 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(6) and a(7) from Robert Price, Sep 03 2012
STATUS
approved