“Números PHP Prime” Código de respuesta

Números PHP Prime

<?php
$number = 10;  
$count=0;  
for ( $i=1; $i <= $number; $i++)  
{  
if (($number % $i)==0)  
{  
$count++;  
}  
}  
if ($count < 3)  
{  
echo "$number is a prime number.";  
}
else
{
echo "$number is not a prime number."; 
}
?>