The book is now available! 2991
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ Phi(2991) = 1992. [McCranie]

+ The smallest number with two prime factors summing to 1000 -- curiously with three digits the same as the previous number (2491) with prime factors summing to a power of ten.

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