The tripent is equal to \(\lbrace5,5,5\rbrace\) or \(5\lbrace5\rbrace5\) in BEAF, \(5\uparrow\uparrow\uparrow\uparrow\uparrow5\) in arrow notation, or 5 heptated to 5.. The term was coined by Jonathan Bowers. This is the fifth Ackermann number.
The name of this number is based on tri- (three) and penta- (five), meaning that there are 3 5's in the array.
|Up-arrow notation||\(5\uparrow\uparrow\uparrow\uparrow\uparrow5\) (exact)|
|Hyper-E notation||\(E(5)1\#1\#1\#1\#5\) (exact)|
|Chained arrow notation||\(5\rightarrow5\rightarrow5\) (exact)|
|Hyperfactorial array notation||\(6!4\)|
- ↑ Bowers, Jonathan. Infinity Scrapers. Retrieved January 2013.
- ↑ Numbers from linear array notation | Steps Toward Infinity!