The book is now available! 237
(another Prime Pages' Curiosity)
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+ 2^(237 - 1) + 237 is prime. [Zeisel]

+ The smallest 3-digit prime-digit number that is not prime nor any of the permutations of its digits is prime. [Sladcik]

(There is one curio for this number that has not yet been approved by an editor.)




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