Tethrato-tethrathoth

The tethrato-tethrathoth (also called tethrarxitri) is equal to E100#^^#^^#100 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.

Etymology
The name "tethrato-tethrathoth" is based on the "tethrato-" operator and tethrathoth.

The name "tethrarxitri" is based on the number tethrathoth, "arx-" meaning "citadel" in Latin, and "tri" meaning three.