#include <bits/stdc++.h>

using namespace std;

using bigint = __int128_t;

int go(int v, const vector<int> &p, vector<bool> &used) {
  used[v] = true;
  int w = p[v];
  if (used[w])
    return 1;
  return 1 + go(p[v], p, used);
}

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

string stringify(bigint x) {
  string ret;
  while (x) {
    ret += x % 10 + '0';
    x /= 10;
  }
  reverse(ret.begin(), ret.end());
  return ret;
}

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

  int n, k;
  cin >> n >> k;
  vector<int> x(n);
  for (int i = 0; i < n; i++)
    x[i] = i;

  for (int i = 0; i < k; i++) {
    int a, b;
    cin >> a >> b;
    --a, --b;
    swap(x[a], x[b]);
  }

  vector<int> p(n);
  for (int i = 0; i < n; i++)
    p[x[i]] = i;

  bigint ret = 1;
  vector<bool> used(n);
  for (int i = 0; i < n; i++) {
    if (!used[i]) {
      bigint l = go(i, p, used);
      ret = ret * l / gcd(ret, l);
    }
  }

  cout << stringify(ret) << endl;
  
  return 0;
}