#include <stdio.h>
char v[1000000];
long long w[1000000];
int main()
{
	long long n,i,j,p,k=1,c,r;
	freopen("frac.in","r",stdin);
	freopen("frac.out","w",stdout);
	scanf("%lld%lld",&n,&p);
	for (i=2;i<=1000000;i++)
	{
		if(n%i==0)
		{
			j=1;
			while(i*j<=1000000)
			{
				v[i*j]=1;
				j++;
			}
		}
		if(v[i]==0) w[++k]=i;
	}
	c=p/k;
	r=p%k;
	w[0]=-1;
	w[1]=1; 
	printf("%lld",n*c+w[r]);
}