The book is now available! 4421
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 4421 = 1! - 2! + 3! - 4! + 5! - 6! + 7! is prime. [Poo Sung]

+ The elevation of the summit of Mount Whitney, the highest summit in the contiguous United States, is 4421 meters using a new vertical datum established in 1988 (NAVD88). [Green]

(There are 5 curios for this number that have not yet been approved by an editor.)

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