Question 71310
Start by dividing by 2: 140/2=70

As long as you can, divide by 2 again: 70/2=35

2 does not divide into 35, so you have to pick the next prime that will...5

35/5=7. 7 is prime and so is 5. You used 2 twice. Therefore, the prime factorization is {{{2^2*5*7}}}