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A tretrigintillion or trestrigintillion is equal to $$10^{102}$$, or one hundred googol, in the short scale, or $$10^{198}$$ in the long scale by Conway-Wechsler system.[1][2][3][4][5] Trestrigintillion is an original name by Conway and tretrigintillion is a modified simple name.

In the long scale which is commonly used in France and Germany, $$10^{102}$$ is called septendecillion.

Sbiis Saibian says that Jonathan Bowers coined the name triginti-tretillion, referring to the short scale value of this number.[6]

There are roughly 560 tretrigintillion possible permutations of an expert-level Minesweeper puzzle.

Ten tretrigintillion is required to hire May O'Neil as a manager in the AdVenture Capitalist video game.

This number is also called twoduplex.[7]

Aarex Tiaokhiao calls this number gooaol, and it's equal to a(10,100,1) in Aarex's Array Notation.[8]

## Approximations

Notation Lower bound Upper bound
Scientific notation $$1\times10^{102}$$
Arrow notation $$10\uparrow102$$
Steinhaus-Moser Notation 57[3] 58[3]
Copy notation 9[102] 1[103]
Taro's multivariable Ackermann function A(3,335) A(3,336)
Pound-Star Notation #*(10)*100
BEAF {10,102}
Hyper-E notation E102
Bashicu matrix system (0)(0)(0)(0)(0)[1539] (0)(0)(0)(0)(0)[1540]
Hyperfactorial array notation 71! 72!
Fast-growing hierarchy $$f_2(330)$$ $$f_2(331)$$
Hardy hierarchy $$H_{\omega^2}(330)$$ $$H_{\omega^2}(331)$$
Slow-growing hierarchy $$g_{\omega^{\omega^2+2}}(10)$$

### List of prefixed numbers derived from trigintillion

Name Short scale Long scale
untrigintillion 1096 10186
duotrigintillion 1099 10192
tretrigintillion 10102 10198
quattuortrigintillion 10105 10204
quintrigintillion 10108 10210
sextrigintillion 10111 10216
septentrigintillion 10114 10222
octotrigintillion 10117 10228
novemtrigintillion 10120 10234

## Sources

1. Conway and Guy. (1995) "The book of Numbers" Copernicus
2. Steve Olsen, Big-Ass Numbers
3. The Conway-Wechsler System
4. Extensions to the -illions I: Henkle, Conway, and Rowlett
5. Fish. Conway's zillion numbers, July 25, 2021
6. Hyper-E Notation, Large Numbers
7. Googology