4
This number is a composite.
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The Lucas-Lehmer Test states that for p odd, the Mersenne number
2p - 1 is prime iff 2p - 1 divides S(p - 1) where
S(n + 1) = S(n)2 - 2, and S(1) = 4.
Submitted: 1999-09-02 23:40:00; Last Modified: 2008-01-30 17:28:00.
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