Pentofaxul

The pentofaxul is equal to 200!3 in Hyperfactorial array notation. Or 200↑↑↑199↑↑↑198↑↑↑197↑↑↑...↑↑↑3↑↑↑2↑↑↑1 using the up-arrow notation. The term was coined by Lawrence Hollom.Lawrence Hollom's large number site
=== Etymology ===
The name of this number is based on Greek prefix "penta-" and the number "faxul".
===Approximations in other notations===
Notation 	Approximation
Hyper-E notation 	\(\textrm{E}153.90699754796802\#2\#7625597484986\#197\)
Up-arrow notation 	\((3 \uparrow 27) \uparrow\uparrow\uparrow\uparrow 198\)
Chained arrow notation	\((3 \rightarrow 27) \rightarrow 198 \rightarrow 4\)
BEAF 	\(\{\{3,27\},198,4\}\)
Fast-growing hierarchy	\(f_5(200)\)
Hardy hierarchy 	\(H_{\omega^5}(200)\)
Slow-growing hierarchy	\(g_{\eta_{0}}(200)\)
===Sources===
=== See also ===
Category:Numbers
Category:Numbers by Lawrence Hollom
Category:Factorial numbers
Category:Up-arrow notation level
Category:Powers of 200