Petexommthet is equal to \(f_{ heta(\Omega^{10^{15}})}(10)\) using the fast-growing hierarchy. The term was coined by wiki user Denis Maksudov. It is equal to \(f_{\varphi(\underbrace{1,0,0,...,0}_{10^{15}+1 ext{ 0's}})}(10)\) using Veblen function.