23505...58213 (1975-digits)

This number is a composite.

As determined by Ray Chandler and Jonathan Vos Post, this is the largest known prime of the form: (prime(n)-1)! + prime(n)^9 In this case, (prime(137)-1)! + prime(137)^9 = (773-1) + 773^9. No larger such prime has been found up to n = 150.