This project finds prime numbers up to any number between 50 and 20000! First, it calculates the prime numbers, and while it does it tries to estimate how many seconds (rounded) left until it is finished finding the numbers (it does this by seeing how long each number so far took and multiplies that time amount by the number of numbers left to calculate, which may be inaccurate at first but starts to become more accurate). It also says the percentage of the list complete so far. Then it gives you the numbers on the output list afterwards and it lets you see whether any number within range is prime! It goes SUPER FAST (at least for me) because apparently when a list is hidden, it doesn't delete or something like that.
This is a school project. Credit to my teacher