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In Pound-Star Notation, the Pen-astragol is equal to #*(10,10)*(10,10)*(10,10)*(10,10)*(10,10)*100. The name was coined by SuperJedi224.

Source: [1]


Notation Approximation
Scientific notation \(10^{10^{10^{10^{10^{308} } } } }\)
Up-arrow notation \(143\uparrow\uparrow4\)
Fast-growing hierarchy \(f_2(f_2(f_{2}(f_{2}(f_{2}(1015)))))\)
Hardy hierarchy \(H_{\omega^{2}*5}(1015)\)
Slow-growing hierarchy \(g_{\omega^{\omega^{\omega^{\omega^{\omega^{102} } } } } }(1015)\)
Numbers By SuperJedi224

Fibonacci Numbers

Pound-Star Notation