Powderhorn@beehaw.org to Technology@beehaw.orgEnglish · 19 天前The Math Hack You Didn’t Know Was in Your Credit Cardwww.scientificamerican.comexternal-linkmessage-square7fedilinkarrow-up138arrow-down15file-text
arrow-up133arrow-down1external-linkThe Math Hack You Didn’t Know Was in Your Credit Cardwww.scientificamerican.comPowderhorn@beehaw.org to Technology@beehaw.orgEnglish · 19 天前message-square7fedilinkfile-text
I’ve been familiar with the concept, but this is by far the best behind-the-scenes explanation I’ve seen.
minus-squareBrad@beehaw.orglinkfedilinkarrow-up14·19 天前A car’s 17-digit VIN has a similar feature, for model years since 1981. The 9th digit is the check digit, and it’s a much more complex algorithm (since the VIN can have numbers and letters.)
A car’s 17-digit VIN has a similar feature, for model years since 1981.
The 9th digit is the check digit, and it’s a much more complex algorithm (since the VIN can have numbers and letters.)