#include<iostream>
using namespace std;
const int N=1e6+10;
int l,r;
int n,m;
int prime[N],b[N],cnt;
int s[N];
int main(){
	cin>>n>>m;
	for(int i=2;i<=m;i++){
		if(!b[i]){
			prime[cnt++]=i;
			s[i]=1+s[i-1];
		}
		else s[i]=s[i-1];
		for(int j=0;prime[j]<=n/i;j++){
			b[prime[j]*i]=1;
			if(i%prime[j]==0)break;
		}
	}
	for(int i=1;i<=n;i++){
		cin>>l>>r;
		if(l<1||r>m){
			cout<<"Crossing the line"<<endl;
			continue;
		}
		else cout<<s[r]-s[l-1]<<endl;
	}
	//for(int i=1;i<=m;i++)cout<<s[i]<<endl;
	return 0;
}