Bi-Unfyn is a number equal to 21(76) using Revised Pehan Notation.[1] The term was coined by Licorneuhh.

It is also equal to 2076(76) = 2075(Bi-Fyn)


Notation Approximation
BEAF \(\{76,76,1,3\}\)
Chained arrow notation \(76\rightarrow 76\rightarrow 76\rightarrow 76\rightarrow 2\)
Hyperfactorial array notation 76![2,2]
Fast-growing hierarchy \(f_{\omega2+1}(76)\)
Hardy hierarchy \(H_{\omega^{\omega2+1}}(76)\)
Slow-growing hierarchy (using this system of fundamental sequences) \(g_{\varphi(2,0,0)}(77)\)


  1. Fyn Group | Licorneuhh's numbers site (retrieved at UTC 12:17 09/01/2021)
Community content is available under CC-BY-SA unless otherwise noted.