KTH ROOT problem

#1

one of my test case failing please correct me where is problem in my code

#2

import java.util.*;
public class Main {
public static void main(String args[]) {
// Your Code Here
Scanner sc = new Scanner(System.in);
int t = sc.nextInt();
if(t>=1 && t<=10) {

	for(int i =0;i<t;i++)
	{
		long n ,k;
		n =sc.nextLong();
		 k = sc.nextLong();
                    // consider this case
		 if(k==1){
			 System.out.println(n);
			 continue;
		 }
		if(n>=1 && n<=Math.pow(10,15) && k>=1 && k<=Math.pow(10,4)) {
				
				
		
		 rootKth(n,k);
		}
		
	}
	}
}
 public static void rootKth(long n1, long k1) {
	long max=0;
	int exit =0;
	for(int x=1;x<10000000;x*=2)
	{
		if(Math.pow(x,k1)<=n1) {
			 max = x;
			
		}else {
			 exit = x;
			break;
		}
	}
	for(int i =exit;i>=(exit/2);i--) {
		if(Math.pow(i,k1)<=n1) {
			 max = i;
			 break;
		}
	}
	System.out.println(max);
	
}

}

#3

1
2069821909 1
Its Correct output is: 2069821909
And Your Code’s output is: 0