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Single Curio View: (Seek other curios for this number) The smallest prime p such that both 2p + 1 and 2p - 1 (= Mp) are primes. Note that both 2Mp - 1 and 2Mp - 1 are also primes. [Beedassy]
Submitted: 2009-08-27 02:27:27; Last Modified: 2009-11-01 08:11:47.
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