You might think it's completely random how they come up with your credit card numbers. But, oh, how wrong could you be! There's a very complex, and very exact method that credit card companies use to come up with those 10 digit numbers. It's called the Luhn Formula, or the modulus 10, or mod 10 for short.
Laptop Battery
The Luhn formula not only helps the credit card companies come up with your numbers. It also allows them to double-check, verify, and validate your card numbers, so they know that cards are actually real when people try to use them for a purchase. Sneaky, right?
| the length and format of the credit card number. identify American Express, Carte Blanche, Discover, enRoute, JCB, Mastercard and Visa cards. $cc_no ="5454 5454 5454 5454"; :identify ($cc_no); / Returns "Mastercard" :validate() Validate a credit card number using the LUHN formula (mod 10).
Thinkpad
Not actually. The Luhn Formula may be complicated, but it's no secret. As anybody in the credit card industry will tell you (maybe except your customer service rep), one of the most basic rules of the Luhn Formula is the so-called check digit, the last digit in your number. The first digit, on the other hand, simply identifies whether a card is a Visa, a Discover Card, a MasterCard, etc. Meanwhile, the middle digits are dedicated all to you, the customer.
Darguz (19 votes) 11830 This function accepts a credit card number and, optionally, a code for a credit card name. If a Name code is specified, specific criteria, then validated with the Luhn Mod 10 formula. Otherwise it is only checked against the formula. It can be used for Visa, Mastercard, Amex, Discover, Diners Club and JCB
Microsoft
Those first and last digits are used in the Luhn Formula to come up with your control number, and your total 10 digit credit card number. On the other hand, when a company wants to verify your card, they take the control digit, plug it into the Luhn Formula, and see if the other nine digits pop out.
You can safely enter your entire credit card number via our secure server, which encrypts all submitted information. Our secure server software (SSL) is the industry standard and among the best software available today for secure commerce transactions. It encrypts all of your personal information, including credit card number, name, and address, so that it cannot be read as the information travels over the Internet. All of our credit card information is stored on a secure, dedicated database.
Laptop Computers
Who came up with the cockamamie scheme? The Luhn Formula was actually created by a bunch of mathematicians back in the 1960s. While others were listening to Jimi Hendrix and going to Woodstock, these guys were figuring out a way to make the credit card companies, and themselves, rich.
- We work to protect the security of your information during transmission by using Secure Sockets Layer (SSL) software, which encrypts information you input.
- We reveal only the last five digits of your credit card numbers when confirming an order. Of course, we transmit the entire credit card number to the appropriate credit card company during order processing.
- It is important for you to protect against unauthorized access to your password and to your computer. Be sure to sign off when finished using a shared computer. for rmation on how to sign off.
Laptop Computer
Believe it or not, the Luhn Formula is also used by the Canadian government to come up with Canadian Social Insurance Numbers. It goes even further than that. Basically, any institution that uses a long primary account number uses the Luhn Formula to create those account numbers, and figure out if your account number is true.
Bill Me Later provides a speedy and secure checkout without having to enter credit card or other account numbers. Based on credit approval, Bill Me Later may be used as a form of payment. Credit Cards We currently accept Visa, MasterCard, American Express and Discover cards. You can safely enter your entire credit card number via our secure server, which encrypts all submitted information.
Desktop Computer
Finally, here's how it works. Starting with the second to last digit and going left, double the value of it and all alternating digits. Then take all of the resulting digits, and the unaffected digits, and add them together. When you get to double digits, add those together (e.g., 12 becomes 1+2), and keep going to the end. The grand total must end with a zero to be true.
Notebooks
Joshua Shapiro recommends Find Credit Cards to find a MasterCard credit card application that's right for you.
Lenovo
[ Comment, Edit or Article Submission ]
