Greagolsudex is equal to E100##3#1#2 using xE#, or Extended Hyper-E notation.[1] The term was coined by Large number YouTuber Douglas shamlin Jr.


Notation Approximation
Chained arrow notation 100→100→(100→100→3)→2
BEAF {100,{100,100,3},1,2}
Strong array notation s(100,s(100,100,3),2,2)
Fast-growing hierarchy \(f_{\omega+1}(f_4(100))\)
Hardy hierarchy \(H_{\omega^{\omega+1}+\omega^4}(100)\)
Slow-growing hierarchy \(g_{\Gamma_{\zeta_0}}(100)\)


  1. Douglas Shamlin Jr., List of large numbers 2020 version (Can we reach 1e4 dislikes?), YouTube (timestamp 33:55).
Community content is available under CC-BY-SA unless otherwise noted.