#include<bits/stdc++.h>
using namespace std;
int su(int q){
	int i,o=1;
	for(i=2;i<q;i++){
		if(q%i==0){
			o=0;
			break;
		}
	}
	return o;
}
int main()
{
	int a[50][50],n,m,i,s=0,j;
	cin>>n>>m;
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			cin>>a[i][j];
		}
	}
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			if(su(a[i][j])==1&&(su(a[i+1][j])==0||i+1==n)&&(su(a[i-1][j])==0||i-1<0)&&(su(a[i][j+1])==0||j+1==m)&&(su(a[i][j-1]==0)||j-1<0))
				s++; 
		}
	} 
	cout<<s;
return 0;

}

/**************************************************************
	Problem: 1997
	User: houshanglin
	Language: C++
	Result: Wrong Answer
****************************************************************/