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(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)

+ phi(19) - pi(19) = 1 + 9. 19 is the only prime with this property. [Firoozbakht]

+ Both numbers reversal(19! - 1) and reversal(19! + 1) are primes. 19 is the largest known prime with this property. [Firoozbakht]

+ 19 is the only known prime of the form n^n - 8. The next prime in this form (if it exists) will have more than 34000 digits. [Firoozbakht]

+ Only known prime of the form p*prime(p)^p + 1, where p is prime. [Firoozbakht]

(There is one curio for this number that has not yet been approved by an editor.)

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