Problem #PRU-60864

Problems Algebra and arithmetic Exponential functions and logarithms Exponential functions and logarithms (other) Calculus Real numbers Rational and irrational numbers Number theory. Divisibility The fundamental theorm of arithmetic. Prime factorisation.
 14–16  3.0

Problem

For what natural numbers \(a\) and \(b\) is the number \(\log_{a} b\) rational?