The book is now available! 2281
(another Prime Pages' Curiosity)
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+ The smallest prime number which is a sum of distinct multidigit primes beginning and ending with the digit seven: 2281 = 727 + 757 + 797. [Capelle]

+ Index p of the largest known perfect number 2p - 1(2p - 1) having both a prime subscript (17) and a prime number of digits (1373). [Beedassy]

(There are 3 curios for this number that have not yet been approved by an editor.)

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