I got time limit exceeded .
import java.util.Scanner;
public class Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int t=s.nextInt();
while(t>0){
int m, n, flag = 0, i, j;
m = s.nextInt();
n = s.nextInt();
if(m==1){
System.out.println("2");
}
for(i = m; i <= n; i++)
{
if( j = 2; j < i; j++)
{
if(i % j == 0)
{
flag = 0;
break;
}
else
{
flag = 1;
}
}
if(flag == 1)
{
System.out.println(i);
}
}
t--;
}
}
}