Tastillion

The tastillion is equal to \(10^{3\times10^{3\times10^{12,000,000,000,000}}+3}\). This term was coined by YouTuber Metsuka The Cute Princess 2007.Metsuka The Cute Princess 2007, All New Official Tier-4 illion Numbers Accessed 2024-05-02.
==Etmology==
This number is generalized from "t" (4th Tier 3 multiplicative root) and "ast" (4th Tier 4 root from "astillion") and the suffix "-illion".
== Approximations ==
Notation 	Expression
Up-arrow notation 	\(10 \uparrow (3 \times (10 \uparrow (3 \times (10 \uparrow (12 \times (10 \uparrow 12)))))+3)\)
Chained arrow notation	\(10 \rightarrow (3 \times (10 \rightarrow (3 \times (10 \rightarrow (12 \times (10 \uparrow 12)))))+3)\)
H* function 	H(H(H(4*H(3)-1)-1)) (exact)
BEAF 	\(\{10,\{3\times \{10,3 \times \{10,12 \times \{10,12\}\}\}+3\}\}\)
==Sources==
Category:Numbers
Category:Videos
Category:Illion
Category:Class 5
Category:Tier 4 -illion numbers