How do you change numbers into index notation?

To change numbers into index notation, express the number as a product of its prime factors. For each prime factor, write it in the form of a base raised to an exponent, where the exponent indicates how many times that prime factor is used. For example, the number 60 can be factored into primes as (2^2 \times 3^1 \times 5^1). This notation clearly shows the composition of the number using its prime factors.