The book is now available! 904117
(another Prime Pages' Curiosity)
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+ 904117 = 9!2^2 + 0!2^2 + 4!2^2 + 1!2^2 + 1!2^2 + 7!2^2. Note that 904117 is the only prime number with this property. [Firoozbakht]




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