The longest factor string for 9 is 3 x 3.
The longest factor string of 44 is contained within the longest factor string of 132.
The longest factor string of 100 is: 2*2*5*5=100
one
The longest factor string for 45 is 3 x 3 x 5
Shorter factor strings aren't composed entirely of prime numbers.
2x2x5x5
2 x 200 4 x 100
Only one can be longest. 2 x 2 x 2 x 3 x 5 x 7
What are the factor strings of 120
2 x 2 x 2 x 3 x 5 x 7
Factor strings don't necessarily have to be composed entirely of prime numbers. But the longest factor string, the one that is entirely prime numbers, that's the prime factorization.