I am confused as to how greg is getting GCF for 720 and 1500 = 60

The prime factorization of 720 is 2^4, 3^2, 5^1
The prime factorization of 1500 is 2^2, 3^1, 5^3

They both share in common, 2^2, 3^1, 5^2 which totals up to a GCF of 300

I am not sure why on the video greg is getting prime factorization for 1500 = 2^2, 3^1, 5^2 when you perform prime factorization you get 5^3, I’m not sure why is isn’t counting one of the 5s when factoring it out

Video Week 1 day 1 Factors and Multiples, video time 52:20 min

I’m not sure why he is getting 5^2 when factoring out 1500, you end up with 5^3. Why isn’t he counting that last 5. If you go to the video and watch him work out the problem you can see him leave out a 5 when completing the factoring of 1500. Pls help :(. Thanks!

But skipping the third power of 5 shouldn’t matter coz anyways you have the common factor as only the first power of 5. Don’t think about it too much. 60 is the GCF. There’s a customer support chat icon on the website, ping them with a screenshot of this and maybe Greg will add a note in the video saying this was a mistake.

I thought it was a mistake at first. But, if you include the 5 he left out while factoring 1500, you get 300 as the GCF. So, I think there is a reason as to why he left that 5 out. I just want to know because I encountered a practice problem that had the same issue. I wish he had more of an explanation.

If you watch him solve that problem, he combines all the prime numbers. But, if you look at his work, you will see that he leaves out a 5 when factoring out 1500. So, my question is, why did he leave that 5 out. The true factored out 1500 = 2^2, 3^1, 5^3. But when greg writes it out, he writes down 2^2, 3^1, 5^2. I don’t get why he left out a 5. I want to know exactly why

Wow, literally stressed all day about how I wasn’t able to get the correct answer for such a simple math problem. I guess he did make a minor mistake listing the factors at the end which confused me. Now, I understand how he picked what both shared in common. I thought he was subtracting the “powers” to the numbers, which at the end would give you 5^2 when putting everything together. But instead you have to see what’s in “common”.