1 #include <iostream>
 2 #include <queue>
 3 #include <stack>
 4 #include <cstdio>
 5 #include <vector>
 6 #include <map>
 7 #include <set>
 8 #include <bitset>
 9 #include <algorithm>
10 #include <cmath>
11 #include <cstring>
12 #include <cstdlib>
13 #include <string>
14 #include <sstream>
15 #define lson l,m,rt*2
16 #define rson m+1,r,rt*2+1
17 #define mod 1000000007
18 #define INF 1000000006
19 using namespace std;
20 typedef long long LL;
21 int n,d,k,p;
22 vector<LL> Q;
23 bool vis[1000000+5];
24 void init()
25 {
26     for(LL i=2;i<=1000000+5;i++)
27     {
28         if(!vis[i])
29         {
30             Q.push_back(i);
31             for(LL j=i*i;j<=1000000+5;j+=i)
32             {
33                 vis[j]=true;
34             }
35         }
36     }
37 }
38 int main()
39 {
40 #ifdef Local
41     freopen("data.txt","r",stdin);
42 #endif
43     int T,i,j,h,r,sum=0,m,ans,flag,q,mid,l;
44     cin>>T;
45     init();
46     while(T--)
47     {
48         ans=flag=0;
49         scanf("%d%d",&n,&d);
50         n=(n-1)/d;
51         for(i=0;Q[i]<=n&&i<Q.size();i++)
52         {
53             ans++;
54             if((d%Q[i])==0)break;
55         }
56         cout<<ans<<endl;
57     }
58 }