#include <iostream>
#include <cassert>
#include <vector>
using namespace std;

struct prime_sturcture
{
    int max_n;
    std::vector<bool> p;
    std::vector<int> prime_list;

    prime_sturcture(int max_n) : max_n(max_n), p(max_n + 1, true)
    {
        p[0] = p[1] = false;
        for (int i = 2; i <= max_n; i++)
        {
            if (p[i])
            {
                prime_list.push_back(i);
                for (int j = i * 2; j <= max_n; j += i)
                {
                    p[j] = false;
                }
            }
        }
    }

    bool is_prime(int n)
    {
        assert(n <= max_n);
        return p[n];
    }

    int size()
    {
        return prime_list.size();
    }

    const int operator[](int i) const
    {
        assert(i < (int)prime_list.size());
        return prime_list[i];
    }

    std::vector<int>::const_iterator begin()
    {
        return prime_list.begin();
    }

    std::vector<int>::const_iterator end()
    {
        return prime_list.end();
    }
};

int main()
{
    int m;
    cin >> m;
    if(!m)
    {
        m += 998244353;
    }
    prime_sturcture prime(50000);
    int l = 0, r = prime.size() - 1;
    vector<int> ans;
    while (m)
    {
        for (int i = 30; i >= 0; i--)
        {
            if (m >= (1 << i) - 1)
            {
                while (prime[l] * prime[r] > 100000)
                {
                    r--;
                }
                for (int j = 0; j < i; j++)
                {
                    ans.push_back(prime[l] * prime[r--]);
                }
                m -= (1 << i) - 1;
                l++;
                break;
            }
        }
    }
    cout << ans.size() << endl;
    for (int a : ans)
    {
        cout << a << " ";
    }
    cout << endl;
}