Grand grand tethrathoth

The grand grand tethrathoth is equal to E100#^#^#...#^#^#100 (grand tethrathoth #'s) = E100#^^#100#3 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian. In Nested Cascading-E Notation, this number is equal to E100#^^#^#100#3.

Etymology
The name of this number is based on the word "grand" and the number "grand tethrathoth".