Duseptimevalka

Duseptimevalka is a googolism coined by SpongeTechX. It is equal to 2[2,7] using his Copy notationSTX Googology.
==Approximations in other notations==
Notation 	Approximation
Scientific notation 	\(10^{10^{10^{10^{10^{22}}}}}\)
Up-arrow notation 	\(17 \uparrow\uparrow 6\)
Chained arrow notation 	\(17 \rightarrow 6 \rightarrow 2\)
BEAF 	\(\{17,6,2\}\)
Hyperfactorial array notation	\((((((22!)!)!)!)!\)
Fast-growing hierarchy 	\(f_2^5(69)\)
Hardy hierarchy 	\(H_{(\omega^2) 5}(65)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{\omega^{\omega^{\omega^{22}}}}}}(10)\)
== Sources ==
Category:Numbers by SpongeTechX
Category:Numbers
Category:Repdigit numbers
Category:Tetration level
Category:Copy notation