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Grand Kiloenourmaquaxul is equal to ((...((200![200(2)200(2)200(2)200])![200(2)200(2)200(2)200])![200(2)200(2)200(2)200]...)![200(2)200(2)200(2)200])![200(2)200(2)200(2)200] (with Kiloenourmaquaxul parentheses), using Hyperfactorial array notation.[1]

### Etymology

The name of this number is based on the word "grand" and the number "Kiloenormaquaxul".

### Approximations

Notation Approximation
Bird's array notation $$\{200,\{200,3,201[1[1\neg4]200[1\neg4]200[1\neg4]200[1\neg4]200]2\} \\ ,201[1[1\neg4]200[1\neg4]200[1\neg4]200[1\neg4]200]2\}$$
Hierarchical Hyper-Nested Array Notation $$\{200,\{200,3,201[1[1/3\sim2]200[1/3\sim2]200[1/3\sim2]200[1/3\sim2]200]2\} \\ ,201[1[1/3\sim2]200[1/3\sim2]200[1/3\sim2]200[1/3\sim2]200]2\}$$
BEAF $$\{200,\{200,3,201(\{X,\{X,\{X,\{X,199X,1,1,5\}+199X,1,1,4\} \\ +199X,1,1,3\}+199X,1,1,2\})2\},201(\{X,\{X,\{X, \\ \{X,199X,1,1,5\}+199X,1,1,4\}+199X,1,1,3\}+199X,1,1,2\})2\}$$[2]
Fast-growing hierarchy (using this system of FSes) $$f_{\varphi(1,0,0,\varphi(2,0,0,\varphi(3,0,0,\varphi(4,0,0,198)+199)+199)+199)+200} \\ (f_{\varphi(1,0,0,\varphi(2,0,0,\varphi(3,0,0,\varphi(4,0,0,198)+199)+199)+199)+199}^2(200))$$
Hardy hierarchy $$H_{\varphi(1,0,0,\varphi(2,0,0,\varphi(3,0,0,\varphi(4,0,0,198)+199)+199)+199)\times(\omega^{200}+\omega^{199}2)}(200)$$
Slow-growing hierarchy $$g_{\theta(\varphi(1,0,0,\varphi(2,0,0,\varphi(3,0,0,\varphi(4,0,0,\Omega+199)+199)+199)+199)+200,} \\ _{\theta(\varphi(1,0,0,\varphi(2,0,0,\varphi(3,0,0,\varphi(4,0,0,\Omega+199)+199)+199)+199)+199,} \\ _{\vartheta(\varphi(1,0,0,\varphi(2,0,0,\varphi(3,0,0,\varphi(4,0,0,\Omega+199)+199)+199)+199)+199)))}(200)$$

### Sources

1. Lawrence Hollom's large numbers site
2. Using particular notation $$\{a,b (A) 2\} = A \&\ a$$ with prime b.
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