The wilkillion is equal to 763,991.[1] The term was coined by Garrett Wilkinson.

Approximations in other notations

Notation Lower bound Upper bound
Scientific notation \(7.63991\times10^5\)
Arrow notation \(91\uparrow3\) \(92\uparrow3\)
Steinhaus-Moser Notation 6[3] 7[3]
Copy notation 6[6] 7[6]
Chained arrow notation \(91\rightarrow3\) \(92\rightarrow3\)
Taro's multivariable Ackermann function A(3,16) A(3,17)
Pound-Star Notation #*(63)*3 #*(64)*3
PlantStar's Debut Notation [3] [4]
BEAF {91,3} {92,3}
Bashicu matrix system (0)[875] (0)[876]
Bird's array notation {91,3} {92,3}
Hyperfactorial array notation 9! 10!
Strong array notation s(91,3) s(92,3)
Fast-growing hierarchy \(f_2(15)\) \(f_2(16)\)
Hardy hierarchy \(H_{\omega^2}(15)\) \(H_{\omega^2}(16)\)
Slow-growing hierarchy \(g_{\omega^3}(91)\) \(g_{\omega^3}(92)\)


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