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(another Prime Pages' Curiosity)
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+ A Mersenne prime exponent expressible as the sum of five distinct Mersenne prime exponents (132049 = 13 + 17 + 1279 + 44497 + 86243). [Luhn]

+ The largest "prime time" p of day on a 24-hour clock in hours, minutes, and seconds (13:20:49), such that 2p - 1 is a Mersenne prime. [Capelle]




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