Tethrapeton

The tethrateron is equal to E100#^^#^#5 = E100#^^#####100 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.

Etymology
The name of this number is based on the number tethrathoth and the root "peton" from "polypeton". Polypeton is the name for a 6-dimensional figure and 6-D figures are constructed from multiple 5-D figures (hence the "poly"), so a "peton" can be considered a 5-dimensional figure.