15 lines
267 B
PHP
15 lines
267 B
PHP
<?php
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function prime($a) {
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if (($a % 2 == 0 && $a != 2) || $a < 2)
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return false;
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$limit = sqrt($a);
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for ($i = 2; $i <= $limit; $i++)
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if ($a % $i == 0)
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return false;
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return true;
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}
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foreach (range(1, 100) as $x)
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if (prime($x)) echo "$x\n";
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?>
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