37634
This number is a composite.
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((42 - 2)2 - 2)2 - 2 =
37634 is the fourth term of the Lucas-Lehmer sequence and
equal to 2*31*607. Curiously, the numbers M(2), M(31), and M(607) are all prime. [Wesolowski]
Submitted: 2009-07-06 12:22:08; Last Modified: 2010-01-03 16:30:52.
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