The book is now available! 193957
(another Prime Pages' Curiosity)
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193957 = prime(prime((1!!+9!!+3!!+9!!+5!!+7!!)). Note that 193957 is the only number with this property. [Firoozbakht]

 

  Submitted: 2008-04-18 10:13:37;   Last Modified: 2008-05-03 18:57:18.



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