import std.algorithm;
import std.array;
import std.ascii;
import std.bigint;
import std.complex;
import std.container;
import std.conv;
import std.functional;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

auto readInts() {
	return array(map!(to!int)(readln().strip().split()));
}
auto readInt() {
	return readInts()[0];
}
auto readLongs() {
	return array(map!(to!long)(readln().strip().split()));
}
auto readLong() {
	return readLongs()[0];
}

void readlnTo(T...)(ref T t) {
    auto s = readln().split();
    assert(s.length == t.length);
    foreach(ref ti; t) {
        ti = s[0].to!(typeof(ti));
        s = s[1..$];
    }
}

const real eps = 1e-10;

void main(){
    auto dp = new int[](1000001);
    foreach(i; iota(1, dp.length)) {
        int k = i;
        while(k % 2 == 0) {
            k /= 2;
        }
        while(k % 3 == 0) {
            k /= 3;
        }
        while(k % 5 == 0) {
            k /= 5;
        }
        if(k == 1) {
            dp[i] = dp[i-1] + 1;
        } else {
            dp[i] = dp[i-1];
        }
    }
    while(true) {
        auto l = readInts();
        if(l.length == 1) {
            return;
        }
        auto m = l[0];
        auto n = l[1];
        writeln(dp[n] - dp[m-1]);
    }
}