Yo!
I'm making a program that calculates the prime values but it's getting too slow when it comes to values like a million. My method is that i divide the value with all values from 0 to that value, for instance 0 to 10, if the value is 10. But i think you don't have to divide the value with for instance 6 because you can't divide a value with something that is larger than half of the original one. I don't know how but this is something i tried to compress the time it takes to calculate the values, but it's still too slow.