Writing numbers as exponents

Suppose we have a number

  128

To write it as exponent,

we do it’s prime factorization

128 = 2 × 2 × 2 × 2 × 2 × 2 × 2

128 = 2 ⁷

Similarly,

  For 243

243 = 3 × 3 × 3 × 3 × 3

243 = 3 ⁵

For 625

625 = 5 × 5 × 5 × 5

625 = 5 ⁴

For 18

18 = 2 × 3 × 3

18 = 2 × 3 ²

  For 72

72 = 2 × 2 × 2 × 3 × 3

72 = 2 ³ × 3 ²

For 100

100 = 2 × 2 × 5 × 5

100 = 2 ² × 5 ²

We can also write 100 as

  100 = 10 × 10 = 10 ²