Consider the function f(x)=log3(log2(log4(x)))f(x) = \log_3(\log_2(\log_4(x)))f(x)=log3(log2(log4(x))). What is the domain of f(x)f(x)f(x)?
x>1x > 1x>1
x>4x > 4x>4
x>16x > 16x>16
x>64x > 64x>64