import java.io.*;

class Main{

static final PrintWriter out=new PrintWriter(System.out);

public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int n=Integer.parseInt(br.readLine());
int ans=0;
for(int i=0;i<n;i++){
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
}
out.println(ans);
out.flush();
}

private static boolean isPrime(int a){
if(a==2||a==3||a==5||a==7) return true;
if(a%2==0) return false;
for(int i=3;i<=Math.sqrt(a);i++){
if(a%i==0) return false;
}
return true;
}
} import java.io.*; io.* java class Main{

static final PrintWriter out=new PrintWriter(System.out);

public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int n=Integer.parseInt(br.readLine());
int ans=0;
for(int i=0;i<n;i++){
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
}
out.println(ans);
out.flush();
}

private static boolean isPrime(int a){
if(a==2||a==3||a==5||a==7) return true;
if(a%2==0) return false;
for(int i=3;i<=Math.sqrt(a);i++){
if(a%i==0) return false;
}
return true;
}
} Main static final PrintWriter out=new PrintWriter(System.out); out new PrintWriter(System.out) public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int n=Integer.parseInt(br.readLine());
int ans=0;
for(int i=0;i<n;i++){
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
}
out.println(ans);
out.flush();
} main {
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int n=Integer.parseInt(br.readLine());
int ans=0;
for(int i=0;i<n;i++){
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
}
out.println(ans);
out.flush();
} BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int n=Integer.parseInt(br.readLine()); n Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br int ans=0; ans 0 for(int i=0;i<n;i++){
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
} int i=0; int i=0; i 0 i<n i n i++ i++ i {
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
} {
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
} int a=Integer.parseInt(br.readLine()); a Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br if(isPrime(a)) ans++; isPrime(a) isPrime a ans++ ans out.println(ans) out.println out ans out.flush() out.flush out String[] args args private static boolean isPrime(int a){
if(a==2||a==3||a==5||a==7) return true;
if(a%2==0) return false;
for(int i=3;i<=Math.sqrt(a);i++){
if(a%i==0) return false;
}
return true;
} isPrime {
if(a==2||a==3||a==5||a==7) return true;
if(a%2==0) return false;
for(int i=3;i<=Math.sqrt(a);i++){
if(a%i==0) return false;
}
return true;
} if(a==2||a==3||a==5||a==7) return true; a==2||a==3||a==5||a==7 a==5 a==2||a==3||a==5||a==7 a==2 a 2 a==3 a 3 a==5 a 5 a==7 a 7 return true; true if(a%2==0) return false; a%2==0 a%2 a 2 0 return false; false for(int i=3;i<=Math.sqrt(a);i++){
if(a%i==0) return false;
} int i=3; int i=3; i 3 i<=Math.sqrt(a) i Math.sqrt(a) Math.sqrt Math a i++ i++ i {
if(a%i==0) return false;
} {
if(a%i==0) return false;
} if(a%i==0) return false; a%i==0 a%i a i 0 return false; false return true; true int a a
import java.io.*;

class Main{

static final PrintWriter out=new PrintWriter(System.out);

public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int n=Integer.parseInt(br.readLine());
int ans=0;
for(int i=0;i<n;i++){
int a=Integer.parseInt(br.readLine());
if(isPrime(a)) ans++;
}
out.println(ans);
out.flush();
}

private static boolean isPrime(int a){
if(a==2||a==3||a==5||a==7) return true;
if(a%2==0) return false;
for(int i=3;i<=Math.sqrt(a);i++){
if(a%i==0) return false;
}
return true;
}
}