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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) Just showing those entries submitted by 'Firoozbakht': (Click here to show all) phi(19)  (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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