Java Primality Test


Problem Statement :


A prime number is a natural number greater than 1 whose only positive divisors are 1 and itself. For example, the first six prime numbers are 2, 3, 5, 7, 11, and 13.

Given a large integer, n, use the Java BigInteger class' isProbablePrime method to determine and print whether it's prime or not prime.

Input Format

A single line containing an integer,  (the number to be checked).

Constraints

 n contains at most 100 digits.

Output Format

If n is a prime number, print prime; otherwise, print not prime.


Solution :



title-img


                            Solution in C :

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

     public static void main(String[] args) {
     Scanner in = new Scanner(System.in);
     BigInteger n = in.nextBigInteger();
     in.close();
      if(n.isProbablePrime(1)){
         System.out.println("prime");
      }
      else{
         System.out.println("not prime");
      }

    }
}
                        




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