The book is now available! 904265051
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ A number has a prime root score of n if the floor functions of its first through nth roots are prime numbers. For example, the first through sixth roots of 29947 are 29947, 173, 31, 13, 7, and 5 so 29947 has a prime root score of 6. The first eight record breakers are: 1 : 2 2 : 5 3 : 11 4 : 29 5 : 53 6 : 127 7 : 131 8 : 904265051 [Gaydos]

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