The check digit is not doubled the first digit doubled is immediately to the left of the check digit. This number must pass the following test:įrom the rightmost digit, which is the check digit, and moving left, double the value of every second digit.
The formula verifies a number against its included check digit, which is usually appended to a partial account number to generate the full account number. It was so effective that the percentage of mistyped sequential numbers could not be implemented. Most identification numbers such as credit card numbers, IMEI and even government number system uses this formula. It is created with a mod-10 checksum formula that generates number sequence that is designed to protect against accidental errors or malicious guessing of credit card numbers. How Valid Credit Card Number is Generated ?Ĭredit card number are not just some random number.
0 kommentar(er)
