The book is now available! 3087
(another Prime Pages' Curiosity)
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+ The sum of the first 40 primes is the product of two prime powers of primes, whose reversal is also the product of two prime powers of primes. Note that 3087 = 3^2 * 7^3 and 3087 reversed is 7803 = 3^3 * 17^2. [Post]

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