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$<?php function iprimes_upto($limit){ for ($i = 2; $i < $limit; $i++){ $primes[$i] = true; } for ($n = 2; $n < $limit; $n++){ if ($primes[$n]){ for ($i = $n*$n; $i < $limit; $i += $n){ $primes[$i] = false; } } } return $primes; } echo(iprimes_upto(1000)); ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
$ Warning: Array to string conversion in /in/0e5Dc on line 15 Array
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
$ Notice: Array to string conversion in /in/0e5Dc on line 15 Array
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 7.3.32 - 7.3.33
$Array
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240.1 ms | 403 KiB | 350 Q