This article is a stub. You can help Googology Wiki by expanding it. The ectorial is a function invented by Aarex Tiaokhiao. It's a type of nested factorial notation. The function is denoted and defined as n!4 = (((n!)!)!)!. Sources ↑ Nested Factorial Notation - Aarex's Large Numbers (archived) Retrieved from "https://googology.wikia.org/wiki/Ectorial?oldid=326884" Categories Article stubs Factorials Community content is available under CC-BY-SA unless otherwise noted.