Deufyn is a number equal to 12(76) using Revised Pehan Notation.[1] The term was coined by Licorneuhh.

It can also be described as 1176(76) = 1175(Unfyn)


Notation Approximation
BEAF \(\{76,76,3,2\}\)
Chained arrow notation \(76\rightarrow 76\rightarrow 76\rightarrow 4\)
Hyperfactorial array notation 76![4]
Fast-growing hierarchy \(f_{\omega+3}(76)\)
Hardy hierarchy \(H_{\omega^{\omega+3}}(76)\)
Slow-growing hierarchy (using this system of fundamental sequences) \(g_{\varphi(1,2,0)}(77)\)


  1. Fyn Group | Licorneuhh's numbers site (retrieved at UTC 23:52 08/01/2021)
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