The book is now available! 2222
(another Prime Pages' Curiosity)
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+ 2222 = 21 + 22 + 23 + 25 + 27 + 211. Note that the number of 2s in the equation equals the larger of the prime exponents, which form a prime sequence, with the exception of '1.' [Gevisier]

+ The smallest number divisible by a 1-digit prime, a 2-digit prime, and a 3-digit prime. [Trotter]

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