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A062622
Numbers k such that 56^k - 55^k is a prime.
0
3, 17, 293, 1303, 3331, 4639, 7043, 35201, 46441
OFFSET
1,1
COMMENTS
Terms greater than 1000 often correspond only to strong pseudoprimes. [Clarified by M. F. Hasler, Sep 15 2013]
a(10) > 10^5. - Robert Price, Oct 26 2013
KEYWORD
nonn,hard
AUTHOR
Mike Oakes, May 18 2001, May 19 2001
EXTENSIONS
a(8)-a(9) from Robert Price, Oct 26 2013
STATUS
approved