The book is now available! 3467
(another Prime Pages' Curiosity)
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+ The number 3467 and its reversal are the only four-digit left-truncatable emirps with left-truncatable reversal. [Punches]

+ The smallest emirp containing all distinct digits n for which n!-1 is a factorial prime. [Loungrides]

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




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