The colossigog is equal to E100#{50,000,000,000,000,000}#100 = E100#{#}#50,000,000,000,000,000 in Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

It is pronounced as follows:


Approximations in other notations Edit

Notation Approximation
BEAF \(\{X,X,1,49999999999999999\}\ \&\ 100\)
Bird's array notation \(\{100,49999999999999999 [1 [2\neg3] 2] 2\}\)
Hyperfactorial array notation \(100![1] w(1)/49,999,999,999,999,998\)
Fast-growing hierarchy \(f_{\varphi(\omega,0,0)}(f_{2}(49))\)
Hardy hierarchy \(H_{\varphi(\omega,0,0)+\omega^2}(49)\)
Slow-growing hierarchy \(g_{\vartheta(\Omega_{2}*\omega)}(g_{\omega^6}(607))\)


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