All you have to do, is input 2 numbers and my program will tell you the Lowest Common Multiple(LCM). What is LCM? - Well it is basically gathering a certain amount of numbers(in this case 2) and then finding out what the smallest multiple of them both is (has to be the same number) but with 2 primes you just have to multiply them both by each other to get the LCM. e.g. 4,6; The LCM for this would be 24 because that's the smallest number that they both go into. If you would like further info, please comment on my profile page :)
Funny thing, the GCF of something is always going to be smaller than the LCM even though the names state Lowest/Least and Greatest( sell link below for GCF calculator : https://scratch.mit.edu/projects/155488657/ Thank you :)