Zettotetrom

Zettotetrom is equal to \(f_{\omega\uparrow\uparrow10^{21}}(10)\) using the fast-growing hierarchy.My system of number names (FGS) - Traveling To The Infinity The term was coined by wiki user Denis Maksudov.
== Etymology ==
The 3 parts of the name, "zetto", "tetr" and "om", mean \(10^{21}\), tetration and \(\omega\) respectively, which form \(\omega\uparrow\uparrow10^{21}\) when concatenated backwards. So the full name indicates the ordinal index of the FGH.
== Approximations in other notations ==
Notation 	Approximation
BEAF 	\(X \uparrow\uparrow (10^{21}-1)\ \&\ 10\)
Bird's array notation 	\(\{10,\{10,21\}[1 \backslash 2] 2\}\)
Extended Cascading-E Notation	\(\textrm E10\#\text{^^}\#(10^{21})\)
Hardy hierarchy 	\(H_{\omega \uparrow \uparrow {10^{21}+1}}(10)\)
Slow-growing hierarchy 	\(g_{\vartheta(\Omega \uparrow \uparrow 10^{21})}(10)\)
== Sources ==
Category:Numbers
Category:Numbers by Denis Maksudov
Category:10-based FGH numbers
Category:Epsilon level
Category:-trom