The book is now available! 99999999944441
(another Prime Pages' Curiosity)
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                                                             9999 9999944441
+ The reverse concatenation of the first three squares as many times is a prime and its digit reversal 14444999999999 is also an emirp. [Murthy]

+ The largest prime (emirp) that contains each nonzero square digit d, d times only. [Loungrides]

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