Cris@lemmy.world to Femcel Memes@lemmy.blahaj.zoneEnglish · 4 months agomimi rule (crosspost)lemmy.blahaj.zoneimagemessage-square15linkfedilinkarrow-up1225arrow-down13 cross-posted to: [email protected]
arrow-up1222arrow-down1imagemimi rule (crosspost)lemmy.blahaj.zoneCris@lemmy.world to Femcel Memes@lemmy.blahaj.zoneEnglish · 4 months agomessage-square15linkfedilink cross-posted to: [email protected]
minus-squareRiskablelinkfedilinkEnglisharrow-up35·4 months 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-squareDefault Username@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up19·4 months agoBut you only can ask one question and asking for their CC information won’t help you find the exit.
minus-squareDefault Username@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up2·4 months agoYou make a good point there…
minus-squareWirlocke@lemmy.blahaj.zonelinkfedilinkEnglisharrow-up2·4 months 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-squareRiskablelinkfedilinkEnglisharrow-up4·4 months 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”.
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 👍
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…
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!