#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int gcd(int x,int y)
{
	int c=x%y;
	while(c)
	{
		x=y;
		y=c;
		c=x%y;
	}
	return y;
}
int main()
{
	int n,q;
	cin>>n>>q;
	for(int i=1;i<=q;i++)
	{
		int a,b;
		scanf("%d%d",&a,&b);
		int min=gcd(a,b);
		if(min!=1)
			printf("2\n");
		else printf("%d\n",min);
	}
	return 0;
}