The largest known factorial prime of the form n! − 1 is equal to 208,003! − 1, which is 1,015,843 digits long; it was discovered on July 25, 2016.[1]
The largest known factorial prime of the form n! + 1 is equal to 422,429! + 1, which is 2,193,027 digits long; it was discovered on February 21, 2022.[1]
Sources[]
- ↑ 1.0 1.1 The Top Twenty: Factorial primes Retrieved 2022-08-09.