#include <fstream.h>
#include <iostream.h>
long long v[45000],w[45000];
int main()
{ long p,k=0,d=2,i,ok,ok2,y;
long x;
ifstream f ("gfact.in");
ofstream g ("gfact.out");
f>>x>>p;	
for (d=2;d*d<=x;d++){
	k=0;
	while (x%d==0) { k++; x/=d;}
	if (k>0) v[d]=k*p;
}
if (x>1) v[x]=1*p;
y=2; d=2; ok=0;
while (ok==0) {x=y; 
	for (d=2;d*d<=x;d++){
	k=0;
	while (x%d==0) { k++; x/=d;}
	if (k>0) w[d]+=k;
	}
	if (x>1) w[x]+=1;
	ok2=1; i=2;
	if (v[i]>0 && v[i]>w[i]) ok2=0;
	else {
		for (i=3;i<=44999;i+=2)
			if (v[i]>0 && v[i]>w[i]) ok2=0;
	}
	if (ok2==1) ok=1;
	else y++;
}
g<<y;	
f.close();
g.close();
return 0;
}