The book is now available! 8999
(another Prime Pages' Curiosity)
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+ The largest four-digit near-repdigit prime is the reversal of the largest four-digit semiprime. [Silva]

+ (8999, 9001) is the only case of twin primes less than a googol of form (9*10^n-1, 9*10^n+1). [Loungrides]

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