Trisept

The trisept is equal to \(\lbrace7,7,7 \rbrace\) or \(7\lbrace7\rbrace7\) (7 enneated to 7) in BEAF. The term was coined by Jonathan Bowers. This is the seventh Ackermann number.
ARsygo coined trihept for this number.AR Googol - Numbers from BEAF. Retrieved 2022-12-05.
== Etymology ==
The name of this number is based on tri- (three) and septa- (seven), meaning that there are 3 7's in the array.
== Approximations ==
Notation 	Approximation
BEAF 	\(\{7,7,7\}\) (exact)
Up-arrow notation 	\(7\uparrow^{7} 7\) (exact)
Chained arrow notation 	\(7\rightarrow 7\rightarrow 7\) (exact)
Hyperfactorial array notation	\(9!6\)
Notation Array Notation 	\((7\{3,3\}7)\) (exact)
Fast-growing hierarchy 	\(f_{8}(7)\)
Hardy hierarchy 	\(H_{\omega^{7}5}(7)\)
Slow-growing hierarchy 	\(g_{\varphi(6,0)}(7)\)
== Sources ==
== See also ==
Category:Numbers
Category:Numbers by Jonathan Bowers
Category:Up-arrow notation level
Category:3 entry linear
Category:BEAF
Category:Powers of 7