The book is now available! 178697
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ The smallest emirp that is the sum of a triangular number and its reversal (91378+87319=178697). It is also expressible as the sum of two squares (419^2+56^2). [Bajpai]

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