what is common prime factor?

Question

anonymous · Answer

The prime factor of a number is the lowest possible factorization. When finding the prime factors of a number, you are breaking it down into the lowest possible numbers that can be multiplied together to make the original number.
For example, the prime factors of 20 would be as follows.

20 = 2 * 2 * 5

anonymous · Answer

common prime factor?

anonymous · Answer

lets say      The Prime factorization of 16 is: 2 × 2 × 2 × 2
The Prime factorization of 22 is: 2 x 11

so the only common prime factor is 2.

anonymous · Answer

because 2 is found in both of the prime factory for both numbers

anonymous · Answer

replace 22 by 8 then what will be the common prime factor of 16 and 8

anonymous · Answer

16: 2x2x2x2 
8:2x2x2 
the common rime factor is 2x2=4

anonymous · Answer

but 4 is not a prime

directrix · Answer

There is a cool online prime factor calculator at this link: http://www.mathwarehouse.com/arithmetic/numbers/prime-number/prime-factorization-calculator.php