Good solution, but implementation can be cleaner. Not everyone likes a one-liner, but you can do the same approach in 1-3 lines. Please see my solution :D

you can do root = int(num**0.5) and remove import math

because range works like (start,end], which excludes the end
it wont work if its just "root" and you have perfect square, because just "root" will exclude sqrt(n) itself
suppose 9, and root = sqrt(9) = 3
then range(1,3) is just 1,2.

I had thought about doing this because my first solution was timing out. It is cool that it works. Great job.

Why do we need to + 1 on the root?

Hey this is just like mine!

Also that property is slightly wrong. Its 1 < p <= sqrt(n). Look at 9 for example. The factor that makes it not prime is 3. 3 is not less than sqrt(9).

I just saw your reply (it's been a while since my last connection). Thank you very much for your comment!