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A062579
Numbers k such that 13^k - 12^k is prime.
1
17, 31, 41, 47, 109, 163, 643, 2459, 9743, 30271, 87557
OFFSET
1,1
COMMENTS
Terms greater than 1000 may correspond to (unproven) strong pseudoprimes. [Clarified by M. F. Hasler, Sep 16 2013]
PROG
(PARI) is(n)=ispseudoprime(13^n-12^n) \\ Charles R Greathouse IV, Jun 12 2017
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
Two more terms 30271 and 87557 (found in 2007 and 2008) from Jean-Louis Charton, Sep 02 2009
STATUS
approved