53245...48801 (4999-digits)
This number is a prime.
On 8 December 2000, David Broadhurst proved that the 4999-digit
generalized repunit (114801 - 1)/10 is prime, making it
the largest known prime not found with classical primality tests
to date.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell