Use APKPure App
Get PrimeNumber byNSDev old version APK for Android
Find out if a number is a prime number or factor it into prime numbers.
*FindingPrime
Take your time, it will determine even 100 or more orders of magnitude.
When it is not prime, you can display and examine the next largest prime number.
*PrimeFactorization
Take your time I will factoring even more than 100 digits.
It can also be used to prime number judgment.