Heads-Tri-2-primol is a number equal to R**(3) using Primarial Functions. It is equal to 5↑↑3↑↑2 (=5↑↑27). The term has been coined by Licorneuhh[1]


Notation Lower bound Upper bound
Arrow notation \(5 \uparrow\uparrow 27\)
Decimal equivalent (Hyper-E notation) E2185#25 E2186#25
Hyper-E notation E[5]1#27
BEAF {5,27,2}
Hyperfactorial array notation 28!1 29!1
Fast-growing hierarchy \(f_3(25)\) \(f_3(26)\)
Hardy hierarchy \(H_{\omega^3}(26)\) \(H_{\omega^3}(27)\)
Slow-growing hierarchy \(g_{\varepsilon_0}(26)\) \(g_{\varepsilon_0}(27)\)


  1. Numbers | Licorneuhh's numbers site (retrieved at UTC 20:18 12/01/2021)
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