#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,b) for(int i=0;i<b;i++)
#define rrep(i,b) for(int i=b-1;i>=0;i--)
#define rep1(i,b) for(int i=1;i<b;i++)
#define repx(i,x,b) for(int i=x;i<b;i++)
#define rrepx(i,x,b) for(int i=b-1;i>=x;i--)
#define fore(i,a) for(auto i:a)
#define fore1(i,a) for(auto &i:a)
#define rng(x) (x).begin(), (x).end()
#define rrng(x) (x).rbegin(), (x).rend()
#define sz(x) ((int)(x).size())
#define pb push_back
#define fi first
#define se second
#define pcnt __builtin_popcountll

using namespace std;
using namespace atcoder;

using ll = long long;
using ld = long double;
template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>;
template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;}
bool yn(bool a) { if(a) {cout << "Yes" << endl; return true;} else {cout << "No" << endl; return false;}}
#define dame { cout << "No" << endl; return;}
#define dame1 { cout << -1 << endl; return;}
#define cout2(x,y) cout << x << " " << y << endl;
#define coutp(p) cout << p.fi << " " << p.se << endl;
#define out cout << ans << endl;
#define outd cout << fixed << setprecision(20) << ans << endl;
#define outm cout << ans.val() << endl;
#define outv fore(yans , ans) cout << yans << "\n";
#define outdv fore(yans , ans) cout << yans.val() << "\n";
#define coutv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define coutv2(v) fore(vy , v) cout << vy << "\n";
#define coutvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define coutvm2(v) fore(vy , v) cout << vy.val() << "\n";
using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>;
using tp = tuple<int ,int ,int>;
using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>;
using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>;
using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>;
using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>;
using mint = modint998244353;
//using mint = modint1000000007;
//using mint = dynamic_modint<0>;
using vm = vector<mint>;
using vvm = vector<vector<mint>>;
vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1};
ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;}
ll lcm(ll a, ll b) { return a/gcd(a,b)*b;}
#define yes {cout <<"Yes"<<endl;}
#define yesr { cout <<"Yes"<<endl; return;}
#define no {cout <<"No"<<endl;}
#define nor { cout <<"No"<<endl; return;}
const double eps = 1e-10;
const ll LINF = 1001002003004005006ll;
const int INF = 1001001001;
#ifdef MY_LOCAL_DEBUG
#define show(x) cerr<<#x<<" = "<<x<<endl
#define showp(p) cerr<<#p<<" = "<<p.fi<<" : "<<p.se<<endl
#define show2(x,y) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<endl
#define show3(x,y,z) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<endl
#define show4(x,y,z,x2) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<" : "<<#x2<<" = "<<x2<<endl
#define test(x) cout << "test" << x << endl
#define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;}
#define showv2(v) fore(vy , v) cout << vy << "\n";
#define showvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;}
#define showvm2(v) fore(vy , v) cout << vy.val() << "\n";
#else
#define show(x)
#define showp(p)
#define show2(x,y)
#define show3(x,y,z)
#define show4(x,y,z,x2)
#define test(x)
#define showv(v)
#define showv2(v)
#define showvm(v)
#define showvm2(v)
#endif

// Sieve of Eratosthenes
// https://youtu.be/UTVg7wzMWQc?t=2774
struct Sieve {
	int n;
	vector<int> f, primes;
	Sieve(int n=1):n(n), f(n+1) { //初期化、f[x] = (xの最も小さい素因数)
	  f[0] = f[1] = -1;
	  for (ll i = 2; i <= n; ++i) {
		if (f[i]) continue;
		primes.push_back(i);
		f[i] = i;
		for (ll j = i*i; j <= n; j += i) {
		  if (!f[j]) f[j] = i;
		}
	  }
	}
	bool isPrime(int x) { return f[x] == x;} //素数判定
	vector<int> factorList(int x) {//素因数分解、xの素因数を小さいものから個数分列挙
	  vector<int> res;
	  while (x != 1) {
		res.push_back(f[x]);
		x /= f[x];
	  }
	  return res;
	}
	vector<pii> factor(int x) {//素因数分解その２、xの素因数を小さいものから(素因数、個数)の形で列挙
	  vector<int> fl = factorList(x);
	  if (fl.size() == 0) return {};
	  vector<pii> res(1, pii(fl[0], 0));
	  for (int p : fl) {
		if (res.back().first == p) {
		  res.back().second++;
		} else {
		  res.emplace_back(p, 1);
		}
	  }
	  return res;
	}
	vector<pli> factor(ll x) {//素因数分解その２-２、xがllの場合
	  vector<pli> res;
	  for (int p : primes) {
		int y = 0;
		while (x%p == 0) x /= p, ++y;
		if (y != 0) res.emplace_back(p,y);
	  }
	  if (x != 1) res.emplace_back(x,1);
	  return res;
	}
  } sieve(1e7);

//   .primes : n以下の素数を小さい順で格納しているベクトル。
//   .isPrime(int x) : xの素数判定。boolで返す
//   .factorList(int x) : xの素因数分解。xの素因数を小さいものから個数分列挙。vector<int>で返す。
//   .factor(int x) : 素因数分解その２、xの素因数を小さいものからpair<int int>{素因数、個数}の形で列挙。vector<pii>で返す。xはllでもok。
//   宣言方法 : n=1e6(デフォルト)で初期化している。
//   注意点 : factorList、factorは呼び出し毎に約数個分の計算時間がかかってしまうため、何度も呼び出すときは予め別の配列に格納しておくこと。

void solve(){
	int k; cin>>k;
	vi p(k),e(k);
	rep(i,k) cin>>p[i]>>e[i];
	vi cnt(1e7);
	vi to(1e7,-1);
	rep(i,k) to[p[i]] = e[i];
	
	int mcnt = 0;
	rep1(i,p[k-1]){
		vpii pp = sieve.factor(i);
		fore1(y,pp){
			if (to[y.fi]==cnt[y.fi]) mcnt--;
			cnt[y.fi] -= y.se;
			if (to[y.fi]==cnt[y.fi]) mcnt++;
		}
		pp = sieve.factor(p[k-1]-i+1);
		fore1(y,pp){
			if (to[y.fi]==cnt[y.fi]) mcnt--;
			cnt[y.fi] += y.se;
			if (to[y.fi]==cnt[y.fi]) mcnt++;
		}
		if (mcnt==k){
			cout2(p[k-1],i);
			return;
		}
	}
	cout2(-1,-1);

	return;
}

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);

	int t = 1;
	//cin>>t;

	rep(i,t){
		solve();
	}

	return 0;
}