#include <stdio.h>
#include <stdlib.h>

int main() {
  freopen("inversmodular.in","r",stdin);
  freopen("inversmodular.out","w",stdout);
  long long a, n;
  scanf("%lld%lld", &a, &n);
  
  for (long long i = 1; i <= n; i++) {
    if ((a * i) % n == 1) {
      printf("%lld\n", i);
      return 0;
    }
  }
  
  return 0;
}