52! is not small. Yet factorials grow slowly compared to the Ackerman function or "busy beavers": https://www.quora.com/What-is-the-fastest-growing-mathematica

52! is not small. Yet factorials grow slowly compared to the Ackerman function or "busy beavers": https://www.quora.com/What-is-the-fastest-growing-mathematical-function https://www.quora.com/What-is-the-fastest-growing-mathematic...