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]

+ The smaller term in the only existing pair of 4-digit left-truncatable emirps, (3467, 7643). [Loungrides]

+ The smallest distinct-digit 4-digit emirp whose the complementary digits create its emirp, i.e., 7643. Is there another such prime? [Loungrides]

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