The book is now available! 59
(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)

+ 59 is the only known mutidigit number n (up to 6000) such that sigma(n^n) + n is prime. The prime related to the next such number (if it exists) has more than 22500 digits. [Firoozbakht]

+ 59 = 5*9 + pi(5*9). It is probably the only multidigit number with this property. [Firoozbakht]




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