4
This number is a composite.
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The Lucas-Lehmer primality 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. [Williams]
Submitted: 1999-09-02 23:40:00; Last Modified: 2026-02-22 01:26:17.
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