Prime Factorization of 245 and

Number 1Number 2(Optional) Enter Number 3

Using the Prime Factorization Method, calculate the GCF of (,245)

Now, show the prime factorization (factor tree) for by expressing it as the product of ALL prime numbers.
Our prime factorization (factor tree) is as follows:
The prime factorization for is

Now, show the prime factorization (factor tree) for 245 by expressing it as the product of ALL prime numbers.
245 = 5 x 49 <--- 5 is a prime number

Next step is to reduce 49 to the product of prime numbers:
49 = 7 x 7 <--- 7 is a prime number

Next step is to reduce 7 to the product of prime numbers:
Our prime factorization (factor tree) is as follows:
The prime factorization for 245 is 5 x 7 x 7

Find Matching Primes from each factorization in red:
Prime factorization for =
Prime factorization for 245 = 5 x 7 x 7

Based on this our GCF is:
GCF of (,245) =
GCF of (,245) = 1