The book is now available! 99997777555533331111
(another Prime Pages' Curiosity)
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                                                       9999777755 5533331111
+ The integer 99997777555533331111, made entirely from nonascending odd digits, factors into primes made entirely from odd digits: 9999 7777 5555 3333 1111 = 11 x 101 x 90007000500030001. [Post]

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