The book is now available! 2137
(another Prime Pages' Curiosity)
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Participate: 		+ The product of the last two digits form a number that is equal to a number formed from the first two digits of this four-digit number (21 = 3 * 7). [Avrutin]

+ 7, 37, 137, and 2137 is prime. [Avrutin]

+ The smallest prime formed from the concatenation of a composite number (21) and its home prime (37). [Beedassy]

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