Cris@lemmy.world to Femcel Memes@lemmy.blahaj.zoneEnglish · 7 days agomimi rule (crosspost)lemmy.blahaj.zoneimagemessage-square15fedilinkarrow-up1203arrow-down13 cross-posted to: onehundredninetysix@lemmy.blahaj.zone
arrow-up1200arrow-down1imagemimi rule (crosspost)lemmy.blahaj.zoneCris@lemmy.world to Femcel Memes@lemmy.blahaj.zoneEnglish · 7 days agomessage-square15fedilink cross-posted to: onehundredninetysix@lemmy.blahaj.zone
minus-squareRiskable@programming.devlinkfedilinkEnglisharrow-up31·7 days agoOooh! This is a great solution to this problem! Just write down both numbers and perform a luhn check: https://en.wikipedia.org/wiki/Luhn_algorithm The one that lies only has a 1 in 10 chance of making up a number that will pass the check! Cool shortcut: If it starts with a 1, 2, 7, 8, or 9, they’re lying. Those are reserved for things that aren’t credit cards 👍
minus-squareWirlocke@lemmy.blahaj.zonelinkfedilinkEnglisharrow-up1·6 days agoI thought credit card numbers were just for credit cards, what are the “things that aren’t credit cards”? Genuine question I’m just curious.
minus-squareRiskable@programming.devlinkfedilinkEnglisharrow-up2·5 days ago1,2: Airline cards (e.g. Lufthansa) 7: Gas cards (Shell, Mobile) 8: Health-related and telecom cards (remember those old Sprint calling cards? That) 9: Reserved. 3,4,5, and 6 are the only types that would count as “credit cards”.
minus-squareDefault Username@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up18·7 days agoBut you only can ask one question and asking for their CC information won’t help you find the exit.
minus-squareJackbyDev@programming.devlinkfedilinkEnglisharrow-up3·6 days agoDid you not read the comic?
minus-squareDefault Username@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up2·6 days agoYou make a good point there…
Oooh! This is a great solution to this problem! Just write down both numbers and perform a luhn check:
https://en.wikipedia.org/wiki/Luhn_algorithm
The one that lies only has a 1 in 10 chance of making up a number that will pass the check! Cool shortcut: If it starts with a 1, 2, 7, 8, or 9, they’re lying. Those are reserved for things that aren’t credit cards 👍
I thought credit card numbers were just for credit cards, what are the “things that aren’t credit cards”? Genuine question I’m just curious.
1,2: Airline cards (e.g. Lufthansa)
7: Gas cards (Shell, Mobile)
8: Health-related and telecom cards (remember those old Sprint calling cards? That)
9: Reserved.
3,4,5, and 6 are the only types that would count as “credit cards”.
Interesting!
But you only can ask one question and asking for their CC information won’t help you find the exit.
Did you not read the comic?
You make a good point there…