The petafaxul (also called faxulquinquenek) is equal to terafaxul!, ((((faxul!)!)!)!)! or (((((200!)!)!)!)!)!, or 200!6 using Nested Factorial Notation. The term was coined by Lawrence Hollom.
The name of this number is based on SI prefix "peta-" and the number "faxul".
- ↑ Factorial Array Notation - Extremely big numbers
- ↑ Lawrence Hollom's large numbers site