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Trialogue is equal to E1#3 = EEE1 = 101010, using Hyper-E notation.[1][2] The term was coined by Sbiis Saibian. It is also equal to 1010,000,000,000, or 1 followed by dialogue (10 billion) zeroes. This number is also equal to 310, or 10↑↑3 using arrow notation. It is 10,000,000,000 digits long. In the short scale this number is called ten trimillitrestrigintatrecenmillitrestrigintatrecenmilliduotrigintatrecentillion. The name of this number is based on Greek prefix "tria-" and the suffix "-logue" for "logarithm".

The number appears in the Schoolhouse Rock! song "My Hero, Zero", although it is not specifically named.[3]

Written out it would take approximately 1,000 books of 300 pages each.

Aarex Tiaokhiao calls this number gooquadr-hol or doocolplex.[4] Landon Curt Noll calls this number ten tremilliamilliamilliatrecentretriginmilliamilliatrecentretriginmilliatrecenduotrigintillion in his page, The English name of a number. Username5243 calls this number goodcolplex or dootol, and it's equal to 10[2]3 = 10[1]10[1]10 in Username5243's Array Notation.[5]

## Approximations in other notations

Notation Lower bound Upper bound
Scientific notation $$1\times10^{10\,000\,000\,000}$$
Down-arrow notation $$10\downarrow\downarrow11$$
Steinhaus-Moser Notation $$9[3][3]$$ $$10[3][3]$$
Copy notation $$9[9[10]]$$ $$1[1[11]]$$
Chained arrow notation $$10→3→2$$
H* function $$H(3H(2))$$ $$H(4H(2))$$
Taro's multivariable Ackermann function $$A(3,A(3,31))$$ $$A(3,A(3,32))$$
Pound-Star Notation $$\#\text{*}((1))\text{*}32679$$ $$\#\text{*}((1))\text{*}32680$$
BEAF $$\{10,3,2\}$$
Bashicu matrix system $$(0)(1)[5]$$ $$(0)(1)[6]$$
Hyperfactorial array notation $$(12!)!$$ $$(13!)!$$
Fast-growing hierarchy $$f_2(f_2(30))$$\) $$f_2(f_2(31))$$\)
Hardy hierarchy $$H_{\omega^22}(30)$$ $$H_{\omega^22}(31)$$
Slow-growing hierarchy $$g_{\omega^{\omega^\omega}}(10)$$