The book is now available! 2421
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 2421 = prime(2)^2 + prime(4)^4 + prime(2)^2 + prime(1)^1. Note that 2421 is the smallest number with this property. [Firoozbakht]




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