This number is a composite.

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The sum of all known Fermat primes, (3, 5, 17, 257, 65537), is a 2-sphenic number, 65819=13*61*83. (A 2-sphenic number is defined as a number that is equal to the product of three 2-digit primes). [Loungrides]

Submitted: 2014-06-15 15:28:01;   Last Modified: 2019-07-22 11:32:41.
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