Verhoeff algorithm: Difference between revisions
Upgraded to 'full' task, plenty of examples, no controversy.
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The [https://en.wikipedia.org/wiki/Verhoeff_algorithm Verhoeff algorithm] is a checksum formula for error detection developed by the Dutch mathematician Jacobus Verhoeff and first published in 1969. It was the first decimal check digit algorithm which detects all single-digit errors, and all transposition errors involving two adjacent digits, which was at the time thought impossible with such a code.
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