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Grand Kilodestruxul is equal to (...((200![200(200)200])![200(200)200])![200(200)200]...)![200(200)200] (with Kilodestruxul parentheses), using Hyperfactorial array notation. The term was coined by Lawrence Hollom.[1]

## Contents

### Etymology

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

### Approximations

Notation Approximation
Bird's array notation $$\{200,\{200,3,201[1[1\neg202]200]2\},201[1[1\neg202]200]2\}$$
Hierarchical Hyper-Nested Array Notation $$\{200,\{200,3,201[1[1/201\sim2]200]2\},201[1[1/201\sim2]200]2\}$$
Fast-growing hierarchy $$f_{\theta(\Omega^{200},198)+200}(f_{\theta(\Omega^{200},198)+199}(f_{\theta(\Omega^{200},198)+199}(200)))$$
Hardy hierarchy $$H_{\theta(\Omega^{200},198)\omega^{200}+\theta(\Omega^{200},198)\omega^{199}2}(200)$$
Slow-growing hierarchy $$g_{\theta(\Omega_2^{200}+\theta_1(\Omega_2^{200},198)+200,\theta(\Omega_2^{200}+\theta_1(\Omega_2^{200},198)+199,} \\ _{\vartheta(\Omega_2^{200}+\theta_1(\Omega_2^{200},198)+199)))}(200)$$