Octa-petaxis

The octa-petaxis (formerly octa-petaksys) is equal to E1#1#1#8 in Hyper-E notation. The term was coined by Sbiis Saibian. In up-arrow notation, this number is equal to \(10\uparrow\uparrow\uparrow\uparrow 8\). 
Username5243 calls this number Tetooctol, and it's equal to 10[4]8 in Username5243's Array Notation.Part 1 - My Large Numbers
== Approximations in other notations ==
Notation 	Approximation
Up-arrow notation 	\(10 \uparrow\uparrow\uparrow\uparrow 8\) (exact)
Chained arrow notation 	\(10 \rightarrow 8 \rightarrow 4\) (exact)
BEAF 	\(\{10,8,4\}\) (exact)
Hyperfactorial array notation	\(10!3\)
Fast-growing hierarchy 	\(f_5(8)\)
Hardy hierarchy 	\(H_{(\omega^4) 8}(10)\)
Slow-growing hierarchy 	\(g_{\eta_0}(8)\)
== Sources ==
== See also ==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Hyper-E numbers
Category:Up-arrow notation level
Category:3 entry linear
Category:Greek-based name
Category:Greagol regiment