#include <bits/stdc++.h>
int F() {
  register int a;
  register char c;
  while (c = getchar(), c < '0' || c > '9')
    ;
  for (a = c - '0'; c = getchar(), c >= '0' && c <= '9'; a = a * 10 + c - '0')
    ;
  return a;
}
const int N = 2e5, M = 2e6 + 5, P = 1e9 + 7;
int p[N], q[N], mp[M], pr[M], times[M], maxcnt[M];
void clcm(register int x) {
  register int id, cur, cnt;
  while (x != 1) {
    cur = pr[id = mp[x]];
    for (cnt = 0; x % cur == 0; x /= cur) ++cnt;
    if (times[id] == cnt) ++maxcnt[id];
    if (((cnt) > times[id] ? times[id] = (cnt), 1 : 0)) maxcnt[id] = 1;
  }
}
bool check(register int x) {
  register int id, cur, cnt;
  register bool ans = 1;
  while (x != 1) {
    cur = pr[id = mp[x]];
    for (cnt = 0; x % cur == 0; x /= cur) ++cnt;
    if (times[id] == cnt && maxcnt[id] == 1) ans = 0;
  }
  return ans;
}
int main() {
  register int n, m, i, j, cnt = 0, ans = 1;
  register bool inc = 0;
  n = F();
  for (i = 0; i < n; ++i) p[i] = F();
  std::sort(p, p + n, std::greater<int>());
  m = p[0];
  for (i = 2; i <= m; ++i) {
    if (!mp[i]) pr[mp[i] = ++cnt] = i;
    for (j = 1; j <= cnt && i * pr[j] <= m; ++j) {
      mp[i * pr[j]] = j;
      if (i % pr[j] == 0) break;
    }
  }
  for (i = 0; i < n; ++i) clcm(q[i] = p[i] - (bool)times[mp[p[i]]]);
  for (i = 1; i <= cnt; ++i) {
    for (j = 1; j <= times[i]; ++j) {
      ans = (long long)ans * pr[i] % P;
    }
  }
  for (i = 0; i < n; ++i) inc |= check(q[i]);
  printf("%d                             \n\n", (ans + inc) % P);
  return 0;
}
