$num = 0;
while ($num < pow(15, 31)) {
$num1 = 1;
while ($num1 < pow(15, 31)) {
$num1 << 1;
}
$num = $num1;
}
$num = 0;
while ($num < pow(15, 31)) {
$num1 = 1;
while ($num1 < pow(15, 31)) {
$num1 << 1;
}
$num = $num1;
}