#include <iostream>
using namespace std;

int main()
{
    int i, j, n, m, s = 0, ma[110][110], d, prim;
    cin>>n>>m;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= m; j++)
            cin>>ma[i][j];
    for (i = 1; i <= n; i++)
    {
        if (i %2 == 0)
        {
            for (j = 1; j <= m; j++)
            {
                prim = 1;
                for (d = 2; d*d <= ma[i][j]; d++)
                    if (ma[i][j]%d == 0)
                        prim = 0;
                if (ma[i][j] < 2)
                    prim = 0;
                if (prim == 1)
                    s++;
            }
        }
    }
    cout<<s;
    return 0;
}