All mainstream credit card numbers obey a mathematical trick designed to catch the most common typos. It’s called the Luhn ...

Learn how online portals instantly check if a credit card number is valid and bank specific offers are instantly applied ...

How does Luhn’s algorithm know when your fingers fumble? Every digit in a credit card number contributes a one-digit number to the final sum in the algorithm.

Most of us use credit cards regularly, but very few know how these cards actually work. Recently, a software engineer and ...

Even though you have been using credit cards for years, there are still many things related to credit cards that you are not ...