So back with some project Euler and retardation that matches a slug traveling to Nevada. This challenge went a bit better, seeing as it took me 20 minutes to learn basic Math from primary and then deciding to cheat and finishing the challenge in 5 minutes or so.
Basically what I am saying is the video is 32 minutes of which only 2 minutes have any form of substance.
There is a way to test for primes using a formula but the higher the number the more false positives you get. You then need to add a list of primes to check against in the test and there are other tests, all of which will take too damn long to figure out.
So for this challenge I had to get the highest Prime factor of a number, this means the biggest prime number that divides into a number and leaving me with 0.
I stole a list of 1000 Prime numbers, reversed it and found the first one that gives me 0 on division. Simple, but probably cheating.
You can find the blog post here:
https://www.freecodecamp.org/news/projecteuler100-coding-challenge-competitive-programming/
And the code site here:
https://www.freecodecamp.org/learn/coding-interview-prep/project-euler/