" onclick="check500()">Check for 500 random numbers</button>
      <ul id="500-results"></ul>
    </div>
  </main>
  <footer class="container">
    <small>
      Check our repository on <a href="https://github.com/mawerty/Is-Prime" target="_blank">Github</a>
    </small>
  </footer>
  <script>
    function checkPrime() {
      let number = document.getElementById("is_prime").value;
      document.getElementById("result").innerHTML = number + " is *<b>not</b>* a prime number."
    }

    function check100() 