Bi-Deufyn is a number equal to 22(76) using Revised Pehan Notation.[1] The term was coined by Licorneuhh.

It is also equal to 2176(76) = 2175(Bi-Unfyn)


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


  1. Fyn Group | Licorneuhh's numbers site (retrieved at UTC 12:17 09/01/2021)
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