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(another Prime Pages' Curiosity)
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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 07:22:08;   Last Modified: 2010-01-03 10:30:52.



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