const fs = require('fs');
const input = fs.readFileSync('/dev/stdin').toString().split('\n');
const num = parseInt(input[0]);
const data = input[1].split(' ');
let count = 0; //์์ ๊ฐ์
let arr=[2,3,5,7,11,13,17,19,23,29,31];//์ ๊ณฑํ์๋ 1000์ดํ์ธ ์์
for(let i = 0; i<num; i++){
let n = parseInt(data[i]);
if(n!==1){
if(!arr.includes(n)){
for(let j =0; j<arr.length;j++){
if(n % arr[j]===0){
break;
}else{
if(j===arr.length-1){
count++;
}
}
}
}else{
count++;
}
}
}
console.log(count);