The Hyperduillion (coined by SuperJedi224) is equal to H*(10,10) using the H* function.

It can be equivalently defined as follows:

Let H(x)=103x+3.

Let n0=10 and nx+1=H(H(...H(10)...))) with nx Hs.


It is greater than and comparable to Saibian's Deka-taxis.

Source: [1]

Notation Approximation
Up-arrow notation 11\uparrow\uparrow\uparrow11
Hyper-E notation E33\#10\#10
Fast-growing hierarchy f_{4}(11)
Hardy hierarchy H_{\omega^{4}}(11)
Numbers By SuperJedi224

Fibonacci Numbers

Pound-Star Notation