The book is now available! 680123
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ SUM[i=1..35] {i such that the Woodall number i*2^i - 1 is prime} = 680123 is the largest known prime partial sum of this form (as of January 2010). [Post]

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