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<?php $counter = 0; while (true) { $counter++; if(($counter % 17) === 0) { $counterStr = "$counter"; $digSum = 0; for($i = 0; $i < strlen($counterStr); $i++) { $digSum = $digSum + (int) $counterStr[$i]; } if($digSum === 17 && $counterStr[strlen($counterStr) - 2] === "1" && $counterStr[strlen($counterStr) - 1] == "7" && $counter !== 917) { var_dump($counter); break; } } }

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22.87 ms | 402 KiB | 5 Q