The book is now available! 117
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 1172 + 2 are primes. [Russo]

+ 117 can be written as the difference of prime squares (112 - 22) or prime cubes (53 - 23). [Sladcik]

+ 117 = (1!2 + 1!2 + 7!2) + (pi(1)!2 + pi(1)!2 + pi(7)!2). Note that 117 is the only number with this property. [Firoozbakht]

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