The book is now available! 1321
(another Prime Pages' Curiosity)
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+ 1321 is an emirp and ((1321!)/(1231!))-1231 is prime. [Patterson]

+ pi(1321) = 13 * 33 * 23 * 13. [Caldwell]

+ The smallest emirp that splits up into two consecutive Fibonacci numbers: 13, 21. Note that the digits consist of the first four nonzero Fibonacci numbers. [Beedassy]

(There are 4 curios for this number that have not yet been approved by an editor.)




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