#include <algorithm>
#include <iostream>
#include <cstdio>
#include <map>
#include <numeric>
#include <cmath>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <complex>
#include <string.h>
#include <unordered_set>
#include <unordered_map>
#include <bitset>
#include <iomanip>
#include <sys/time.h>
#include <random>
using namespace std;

#define endl '\n'
#define ALL(v) (v).begin(), (v).end()
#define RALL(v) (v).rbegin(), (v).rend()
#define UNIQ(v) (v).erase(unique((v).begin(), (v).end()), (v).end())

typedef long long ll;
typedef long double ld;
typedef pair<int, int> P;
typedef complex<double> comp;
typedef vector< vector<ld> > matrix;
struct pairhash {
public:
    template<typename T, typename U>
    size_t operator()(const pair<T, U> &x) const {
	size_t seed = hash<T>()(x.first);
	return hash<U>()(x.second) + 0x9e3779b9 + (seed<<6) + (seed>>2);
    }
};
const int inf = 1e9 + 9;
const ll mod = 1e9 + 7;
const double eps = 1e-8;
const double pi = acos(-1);

int n, k;
int x[1010], y[1010];

ll gcd(ll a, ll b) {
    if (b == 0) return a;
    return gcd(b, a%b);
}

ll lcm(ll a, ll b) {
    return a * b / gcd(a, b);
}

ll solve() {
    int order[n];
    for (int i = 0; i < n; i++) order[i] = i;
    for (int i = k-1; i >= 0; i--) {
        swap(order[x[i]], order[y[i]]);
    }

    vector<ll> vec;
    bool used[n];
    memset(used, false, sizeof(used));
    int s;
    for (int i = 0; i < n; i++) {
        if (!used[i]) {
            s = i;
            used[s] = true;
            int t = order[s], c = 1;
            while (t != s) {
                used[t] = true;
                t = order[t];
                c++;
            }
            vec.push_back(c);
        }
    }

    int l = vec.size();
    ll res = 1;
    for (int i = 0; i < l; i++) {
        res = lcm(res, vec[i]);
    }
    return res;
}

void input() {
    cin >> n >> k;
    for (int i = 0; i < k; i++) {
        cin >> x[i] >> y[i];
        x[i]--; y[i]--;
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(15);

    input();
    cout << solve() << endl;
}