#include<iostream>
#include<vector>
#include<cassert>
#include<atcoder/modint>
using namespace std;
using mint=atcoder::modint;
int N,P;
mint dp[3<<17];
vector<int>yaku[3<<17];
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cin>>N>>P;
	mint::set_mod(P);
	mint sum=0;
	for(int b=1;b<=N;b++)for(int a=b;a<=N;a+=b)yaku[a].push_back(b);
	for(int a=3;a<=N;a++)
	{
		mint c=0;
		for(int b:yaku[a])
		//for(int b=1;b<=a;b++)if(a%b==0)
		{
			sum-=dp[a-b];
			c++;
		}
		//dp[a] = 1 + (sum + c * dp[a])/a
		dp[a]=(a+sum)/(a-c);
		sum+=c*dp[a];
	}
	cout<<dp[N].val()<<endl;
}