999779999159200499899

                                                     9 9977999915 9200499899

+ The final 21 digits of 99^99 have 12 nines and form a prime. [Merickel]

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

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell