It is a composite number. It need not be the power of any number.
For example, 2*2*2*3*3 = 72 which is not the power of any integer.
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how can exponent can make it easier to write an expression with a repeated factor in the product
a perfect square
Power.
The base is the repeated factor, the exponent is the number of times by which the base is mutltiplied by itself. The exponent is also known as the power, althought the product of the exponential expression can also be described as the power.
Exponents can be used to simplify notation when the same factor is repeated