PrimeJudgmentTool

The function of the App is to detect whether a number is prime. This can usually be done by trial division. That is, try all integers from 2 to the square root of the number to see if you can divide the number exactly. If you find a number that divides, it is not a prime number. Otherwise, the number is prime.
A prime number is a natural number greater than 1 that has no factors other than 1 and itself. In other words, a natural number with only two positive factors (1 and itself) is a prime number. Prime numbers play a very important role in number theory. They have many unique properties and uses.
For example, 2, 3, 5, 7, 11, 13, etc., are prime numbers. Numbers like 4, 6, 8, and 9 have factors other than 1 and themselves, so they are not prime numbers.
Prime numbers are widely used in cryptography, mathematical analysis and many other fields. For example, in the RSA encryption algorithm, large prime numbers are used as part of the key to ensure the security of the encryption.