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Is Prime


Is Prime

Checking Prime Numbers

Prime numbers are natural numbers greater than 1 that have no positive divisors other than 1 and themselves. Determining whether a number is prime is a fundamental problem in number theory and has applications in various fields, including cryptography and computer science.

In this challenge, you will implement a function to check if a given number is prime. You will use logical operators and conditional statements to handle the multiple conditions required to identify a prime number efficiently.

Your task

Your task is to complete the function is_prime(n: u32) -> bool that takes an unsigned integer n and returns a boolean value indicating whether n is a prime number.


  • The function should return true if n is a prime number and false otherwise.
  • A prime number is a natural number greater than 1 that is not divisible by any number other than 1 and itself.
  • Use logical operators and conditional statements to check the conditions for a prime number.
  • Optimize the function to minimize unnecessary checks.


let result = is_prime(5);
assert_eq!(result, true);
let result = is_prime(4);
assert_eq!(result, false);


  • Any number less than 2 is not prime.
  • The number 2 is the only even prime number.
  • For any other even number greater than 2, return false.
  • Check divisibility starting from 3 up to the square root of the number.