#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll ILL=2167167167167167167;
const int INF=2100000000;
#define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define all(p) p.begin(),p.end()
template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>;
template<class T> int LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> int UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> bool chmin(T &a,T b){if(b<a){a=b;return 1;}else return 0;}
template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;}
template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());}
template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});}
bool yneos(bool a,bool upp=false){if(a){cout<<(upp?"YES\n":"Yes\n");}else{cout<<(upp?"NO\n":"No\n");}return a;}
template<class T> void vec_out(vector<T> &p,int ty=0){
    if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";}
    else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}}
template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;}
template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;}
template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;}
int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;}
template<class T> T square(T a){return a * a;}

#include <atcoder/segtree>
int op(int a, int b){
    return a + b;
}
int e(){
    return 0;
}

void solve();
// CITRUS CURIO CITY / FREDERIC
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    // cin >> t;
    rep(i, 0, t) solve();
}

void solve(){
    int N = 1'000'100;
    vector<int> table(N, 1);
    rep(i, 2, N){
        if (table[i] == 1){
            for (int j = i; j < N; j += i){
                if (table[j] == 1) table[j] = i;
            }
        }
    }
    table[0] = 1;
    vector<vector<int>> G(N);
    rep(i, 2, N){
        G[i / table[i]].push_back(i);
    }
    G[0].push_back(1);
    atcoder::segtree<int, op, e> seg(N);
    int Q;
    cin >> Q;
    vector<int> L(Q), R(Q);
    rep(i, 0, Q) cin >> L[i] >> R[i];
    vector<vector<int>> H(N);
    vector<int> ans(Q);
    rep(i, 0, Q) R[i]++, H[L[i]].push_back(i);
    rep(i, 0, N){
        for (auto x : H[i]){
            ans[x] = seg.prod(L[x], R[x]);
        }
        for (auto x : G[i]){
            seg.set(x, 1);
        }
    }
    for (auto x : ans) cout << x << "\n";
}