by Niels Triple
Non-Premium, no root required.
Enter a number, and check if it's prime or not. It's as simple as that.
This flow will create an atomic array of primenumbers, but only as big as your request needs it to be.
Large numbers take time to check for the first time, because the array has to be made first, and you can only check a prime if you know ALL the primes between zero and your number first!
Build 201908201600 it's live!
Rate and review within the app in the Community section.