There are lots of implementations for validating Luhn checksums but very few for generating them. I've come across this one however in my tests it has revealed to be buggy and I don't understand th...

I was trying to implement the Luhn Formula in Python. Here is my code: import sys def luhn_check(number): if number.isdigit(): last_digit = int(str(number)[-1]) reverse_sequence = list(int(d) ...

I am using following code to implement Luhn algorithm for credit card check in C# language, but could not get the output to generate the check sum its showing validity. Kindly help me. Thank you in...

I tried to check the validation of credit card using Luhn algorithm, which works as the following steps: Double every second digit from right to left. If doubling of a digit results in a two-digi...

I am trying to implement simple validation of credit card numbers. I read about the Luhn algorithm on Wikipedia: Counting from the check digit, which is the rightmost, and moving left, double the...

I have tried to convert ISBN10 codes to ISBN13 numbers with Java. From . On isbn-13.info I found the way to convert them. Example: 0-123456-47-9 Begin with prefix of “978” Use the first ni...

I am trying to create a program to validate 10 to 12 digit long number sequences based on the luhn algorithm, but my program keeps on telling me that every number is invalid even though they're not...

I'm trying to implement recognition of a valid credit card number so that I can transition to the next field. Given that credit card numbers come in various lengths, my question is whether I can co...

I've used the code from the link below to try and validate a credit card, however I'm not getting an alert when I submit a the wrong data in the field. Strip spaces before performing Luhn check m...

Does anyone have a library or JavaScript snippet to validate the check digit of credit cards before the user hits Submit?

i have an array of card types that looks something like this var cards = new Array(); cards [0] = {name: "VISA", length: "13,16", prefixes: "4", checkdigit: true}; cards [1] = {name: "VISA_...

Hello I am trying to make a function in python to generate valid IMEI numbers so here is my function.The IMEI validation uses the Luhn algorithm so I am trying to implement it in my script. def ge...

I am using the following PHP code to calculate a CRN for BPay: <?php function LuhnCalc($number) { $chars = array_reverse(str_split($number, 1)); $odd = array_intersect_key($chars, array_fill_...

I can initially do a check to identify if I have a valid Payment Card Number by performing Luhn check algorithm. But then I need to identify if it is a Credit card or a Debit card to perform...

First of all, I'm not really sure if this should be on stackoverflow but I thought I would try to ask anyway. In the past I have always used the luhn algorithm for error checking in credit card nu...

For an application we are working on I need to generate sample credit card numbers which pass the Luhn algorithm but which are also unique, so we cannot use the sample credit card numbers. We need...