#include<stdio.h>
#include<queue>
using namespace std;
int h[1000001];
int main(){
	h[1]=1;
	for(int i=2;i<=1000000;i*=2)h[i]=1;
	for(int i=1;i<=1000000;i++){
		if(h[i]){
			for(int j=i*3;j<=1000000;j*=3)if(h[j]==0)h[j]=2;
		}
	}
	for(int i=1;i<=1000000;i++){
		if(h[i]){
			for(int j=i*5;j<=1000000;j*=5)if(h[j]==0)h[j]=3;
		}
	}
	int a,b;
	while(scanf("%d",&a),a){
		scanf("%d",&b);
		int ret=0;
		for(int i=a;i<=b;i++)if(h[i])ret++;
		printf("%d\n",ret);
	}
}