The book is now available! 656
(just those submitted by Firoozbakht)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

Just showing those entries submitted by 'Firoozbakht': (Click here to show all)

+ 656 = pi(6*5*6) * phi(6+5+6). Note that 656 is the smallest multi-digit number with this property. [Firoozbakht]




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