// Prime counting benchmark - count primes up to N
function isPrime(n) {
    if (n < 2) return false;
    if (n === 2) return true;
    if (n % 2 === 0) return false;
    for (let i = 3; i * i <= n; i += 2) {
        if (n % i === 0) return false;
    }
    return true;
}

function countPrimes(n) {
    let count = 0;
    for (let i = 2; i <= n; i++) {
        if (isPrime(i)) count++;
    }
    return count;
}

const count = countPrimes(10000);
console.log(`Primes up to 10000: ${count}`);