# Credit card numbers

DevFeed: [Credit card numbers](<https://devfeed.tech/articles/credit-card-numbers-35282.md>)

Original publisher: [Read original article](<https://darkcoding.net/credit-card-numbers/>)

Author: Graham King

Published: 2005-10-23T14:16:56Z

Content type: article

Language: en

Sources: [Graham King](<https://devfeed.tech/sources/graham-king.md>)

Topics: [Testing](<https://devfeed.tech/topics/testing.md>), [Algorithm](<https://devfeed.tech/topics/algorithm.md>)

Tags: [algorithm](<https://devfeed.tech/tags/algorithm.md>), [bank](<https://devfeed.tech/tags/bank.md>), [credit-card](<https://devfeed.tech/tags/credit-card.md>), [e-commerce](<https://devfeed.tech/tags/e-commerce.md>), [graham-king](<https://devfeed.tech/tags/graham-king.md>), [processor](<https://devfeed.tech/tags/processor.md>), [random](<https://devfeed.tech/tags/random.md>), [validation](<https://devfeed.tech/tags/validation.md>)

## AI overview

This technical resource describes random credit card numbers that conform to the Luhn (MOD 10) check for testing e-commerce pre-validation. It clarifies that the numbers are not valid for purchases and should be declined by the card processor or bank.

## Source excerpt

Credit card numbers that conform to the Luhn formula (MOD 10 check). Usefull for testing e-commerce sites (because they should get past any pre-validation you do, and be declined at the card processor or bank stage). In testing situations any expiry date within the next 3 years should work Feedback forces me to clarify this: These are NOT valid credit card numbers. You can't buy anything with these. They are random numbers that happen to conform to the MOD 10 algorithm.