import java.util.*;
import java.lang.*;
class Main
{
public static void main (String[] args)
{
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int i = 0;
long n1=0;
long n2=0;
while(i<=n){
n1 = sc.nextLong();
n2 = sc.nextLong();
if(n1==1)
{
n1++;
}
if((n1-n2)<=100000){
for(long j=n1;j<=n2;j++){
int count = 0;
for(long k=2;k<=j/2;k++){
if(j%k==0){
count = 1;
}
}
if(count==0){
System.out.println(j);
}
}
}
}
}
}