-
I keep seeing an ad for a bank's credit card, and in the graphic, the first four digits are a combination lock. but the first four digits encode the card type and issuer. so you could look them up if you looked at the branding on the card. also there's a checksum.Permalink Look on archive.org
❤️ 5 Favorites Mood 0
-
it just doesn't work, okay? the advert doesn't make sense if you examine for consistency with credit card number encodings. i think this is a problem.Look on archive.org