The book is now available! 1111111111111111111111
(another Prime Pages' Curiosity)
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                                                    11 1111111111 1111111111
+ The smallest repunit whose prime factors contain all digits from 0 to 9 (1111111111111111111111 = 11*11*23*4093*8779*21649*513239). [Gupta]

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