- Not to be confused with triahectillion.
Triohectillion is equal to \(10^{3\cdot10^{309} + 3}\).[1] It is defined using Sbiis Saibian's generalization of Jonathan Bowers' -illion system. It is the duocentillionth -illion.
Approximations[]
| Notation | Lower bound | Upper bound |
|---|---|---|
| Arrow notation | \(1000\uparrow(1+10\uparrow309)\) | |
| Down-arrow notation | \(1000\downarrow\downarrow104\) | \(514\downarrow\downarrow115\) |
| Steinhaus-Moser Notation | 142[3][3] | 143[3][3] |
| Copy notation | 2[2[310]] | 3[3[310]] |
| H* function | H(H(102)) | |
| Taro's multivariable Ackermann function | A(3,A(3,1026)) | A(3,A(3,1027)) |
| Pound-Star Notation | #*((1))*((1))*9 | #*((1))*((2))*9 |
| BEAF | {1000,1+{10,309}} | |
| Hyper-E notation | E(3+3E309) | |
| Bashicu matrix system | (0)(1)[32] | (0)(1)[33] |
| Hyperfactorial array notation | (170!)! | (171!)! |
| Fast-growing hierarchy | \(f_2(f_2(1019))\) | \(f_2(f_2(1020))\) |
| Hardy hierarchy | \(H_{\omega^22}(1019)\) | \(H_{\omega^22}(1020)\) |
| Slow-growing hierarchy | \(g_{\omega^{\omega^{\omega^23+9}3+3}}(10)\) | |