Created by Hans Peter Luhn at IBM in 1954, the Luhn algorithm works by a process of doubling every second digit from the right and summing all digits. If the total sum is divisible by 10, the number is considered "valid.". Fake credit card generators use this to craft numbers that will pass a payment form's initial validation, but they will, of course, be declined for any real transaction as they are not connected to a bank account. For example, typical generated numbers follow the established patterns for major issuers like Visa (starting with 4) and Mastercard (starting with 51-55).
Which are you using (e.g., Stripe, PayPal, Authorize.Net)?
A is a software tool that creates random strings of numbers that follow the mathematical patterns of real credit cards.
import random
They cannot be used to purchase goods or services.