arg&true|false)) )& test927398716& test927398717& test34567812345678& test34567812345670& ; Note that the original implementation, which follows, is flawed because it assumes that n is a number which, when represented as a string, has an even number of characters.
There was a time when people thought the internet required a completely different payment method than the real world.
If the MII is 9, the next three digits of the issuer identifier are the 3-digit country codes defined in ISO 3166, and the remaining final two digits of the issuer identifier can be defined by the national standards body of the specified country in whatever way wished.
The first few digits can always be used to identify the credit card type.
Typing a 15-16 long string of numbers without a single error can be challenging for most users – yet, it’s what all users have to do during the checkout flow as they reach the ‘Credit Card Number’ form field.
During our large-scale checkout usability study we observed that a large sub-group of users struggle with correctly typing their 15-16 digit credit card number, subsequently struggle with verifying that it’s typed correctly.
That means you can do whatever you want with it — use it in commercial projects, modify it, sell it — as long as you include the copyright notice and licence text.
In the USA we tend to identify the card types as follows: The first 6 digits of your credit card number (including the initial MII digit) form the Issuer Identifier Number or IIN.
The IIN is also referred to as the Bank Identification Number or BIN.
Credit cards on the web sites have become just about as ubiquitous as sign-in forms.
One of my favorite moments in computer science was learning the algorithm for determining a valid credit card number.