The Gavoogol is a number in the googol family, formed by substituting V = 5 for z in the -az- variable infix, as in the zazzification of billion into bazillion. It is equal to g(5, 50, 100) in the Ackermann's Generalized Exponential Notation., a hundred-hexated-to-the-fiftieth, \(100 ↑↑↑↑ 50\) using up-arrow notation or {100,50,4} using BEAF.