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<br><br><br><br><br> is a Prime number<!-- <p> What's your Username?</p>
 <form>
   <input name="name" type="text">
   <input type="submit" value="enter">
   </form>
-->

 <br>
 <p> Please enter number:</P>
  <form>
    <input name="number" type="number" min="1">
    <input type="submit" value="enter">
  </form>