Answer
$2^{3} \times 5^{3}$
Work Step by Step
Divide 1000 by 2 until the result is no longer divisible by 2. The number of times you divided by 2 becomes the exponent for the factor 2.
$2^{3} \times 125$
125 is not divisible by 3. To continue with the prime factorization, divide 125 by 5 until it is no longer divisible by 5. The number of times you divided by 5 becomes the exponent for the factor 5.
$2^{3} \times 5^{3}$
