The book is now available! 171
(another Prime Pages' Curiosity)
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+ 10171 - 171 is prime. [Broadhurst and Titanix]

+ pi(1)!*pi(2)!*pi(3)!*...*pi(171)! - 1 is a 3857-digit prime. [Firoozbakht]

(There are 4 curios for this number that have not yet been approved by an editor.)




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