소수 구하기-시간초과

import java.util.*;
public class Main
{
	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		int m = sc.nextInt();
		int n = sc.nextInt();
		for(int i=m; i<=n; i++)
		{
			if(isPrimeNum(i)) System.out.println(i);
		}
		sc.close();
	}
	public static boolean isPrimeNum(int num)
	{
		int count=0;
		for(int i=2; i<num; i++)
		{
			if(num%i==0) count++;
		}
		if(count==0) return true;
		else return false;
	}
}