Hayden's Trienn

Hayden's Trienn is equal to 9(9)9 in Hayden's Array Notation. The term was coined by googology user HaydenTheGoogologist2009.Hayden's Big Numbers. Retrieved 2022-04-23.
Using Alistair Cockburn's booga- prefix, this number can be named "booganine", and it's equal to \(9\uparrow^{7} 9\) in arrow notation.2.5A. Googological prefixes and suffixes. Retrieved 2021-07-22.
==Approximations==
== Sources ==
Category:Numbers
Category:Numbers by HaydenTheGoogologist2009
Category:Up-arrow notation level
Category:Powers of 3