The pentacthul-ogdon is equal to E100#^^^#^#8 = 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 word "yotton" from "polyyotton".
Approximations in other notations
| Notation | Approximation |
|---|---|
| BEAF | \(\{X,X,8,2\}\ \&\ 100\) |
| Bird's array notation | \(\{100,8[1 [1 \neg 3] 1 [2 \neg 2] 2]2\}\) |
| Hyperfactorial array notation | \(100![1(1)1]w/9\) |
| Fast-growing hierarchy | \(f_{\varphi(1,7,0)}(99)\) |
| Hardy hierarchy | \(H_{\varphi(1,7,0)}(100)\) |
| Slow-growing hierarchy | \(g_{\vartheta(\Omega_2+\vartheta_1(\Omega_2+7))}(100)\) |
Sources
- ↑ Saibian, Sbiis. 4.3.4 - Forging Extended Cascading-E Numbers Part II. Retrieved June 3, 2014.