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Pentacthuldekon is equal to E100#^^^#^#10 = E100#^^^##########100 in Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Etymology[]

The name of this number is based on the number pentacthulhum and the root "dakon" from "polydakon".

Approximations in other notations[]

Notation Approximation
BEAF \(\{X,X,10,2\}\ \&\ 100\)
Bird's array notation \(\{100,10[1 [1 \neg 3] 1 [2 \neg 2] 2]2\}\)
Hyperfactorial array notation \(100![1(1)1]w/11\)
Fast-growing hierarchy (with this system of fundamental sequences) \(f_{\varphi(1,9,0)}(99)\)
Hardy hierarchy \(H_{\varphi(1,9,0)}(100)\)
Slow-growing hierarchy \(g_{\vartheta(\Omega_2+\vartheta_1(\Omega_2+9))}(100)\)

Sources[]

  1. Saibian, Sbiis. 4.3.4 - Forging Extended Cascading-E Numbers Part II. Retrieved June 5, 2014.
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