function isPrime(n) {
    if (n <= 1) return false;
    if (n <= 3) return true;
    if (n % 2 === 0 || n % 3 === 0) return false;
    let i = 5;
    while (i * i <= n) {
        if (n % i === 0 || n % (i + 2) === 0) return false;
        i += 6;
    }
    return true;
}

function findPrimeNumbers() {
    const primeNumbers = [];
    for (let num = 500; num < 600; num++) {
        if (String(num)[0] === '5' && isPrime(num)) {
            primeNumbers.push(num);
        }
    }
    return primeNumbers;
}

function main() {
    const primeNumbers = findPrimeNumbers();
    console.log("Prime numbers with three digits starting with 5:");
    console.log(primeNumbers);
}

main();