press the green flag to calculate 200000 primes (max list length) in ~ 1 minute 9 seconds check: 200000th prime (wolframalpha.com) is 2750159, which is also the result from my calculator
This calculator checks only odd numbers above 2, only checks for divisibility with primes already on the list, and only checks divisibility with numbers less than the square root of the number being checked. If you have any improvements, please leave a comment or remix this project!
