import std.algorithm, std.array, std.container, std.range, std.bitmanip;
import std.numeric, std.math, std.bigint, std.random, core.bitop;
import std.string, std.regex, std.conv, std.stdio, std.typecons;

void main()
{
  auto n = readln.chomp.to!size_t;
  auto k = readln.chomp.to!size_t;
  auto ci = iota(k).map!(_ => readln.split.map!(to!size_t).map!("a - 1")).array;

  auto ni = new size_t[](n);
  foreach (i; 0..n) {
    auto p = i;
    foreach (c; ci) {
      if (p == c[0]) p = c[1];
      else if (p == c[1]) p = c[0];
    }
    ni[i] = p;
  }

  auto ri = new size_t[](n);
  foreach (i; 0..n) {
    auto p = i, c = 0;
    do {
      p = ni[p];
      c += 1;
    } while (p != i);
    ri[i] = c;
  }

  auto r = reduce!((a, b) => a / gcd(a, b) * b)(1.to!size_t, ri);
  writeln(r);
}