#include<stdio.h>
long long int gcd(long long int a, long long int b)
{
	if (b == 0)
		return a;
	else
		return gcd(b, a % b);
}
int main()
{
	long long int n, p;
	scanf("%lld %lld", &n, &p);
	if (p == 2)
	{
		if (n % 2 > 0)
			printf("Yes\n");
		else
			printf("No\n");
		return 0;
	}
	if (n + 1 == p)
	{
		printf("Yes\n");
		return 0;
	}
	n = gcd(p - 1, n + 1);
	if (n > 1)
		printf("Yes\n");
	else
		printf("No\n");
	return 0;
}