Gigaextremebixul

The Gigaextremebixul is equal to Megaextremebixul![2[200],[200]] or (((200![2[200],[200]])![2[200],[200]])![2[200],[200]])![2[200],[200]] using Hyperfactorial array notation. The term was coined by Lawrence Hollom.

Etymology
The name of this number is based on Latin prefix "giga-" and the number "Extremexul".