Wiktionary (0.00 / 0 votes) Rate this definition: fodder (Noun). Food for animals. fodder (Noun). A weight by which lead and some other metals were formerly sold, in England, varying from 19 1/2 to 24 cwt (993 to 1222 kg).; a fodder. fodder (Noun). Tracing paper. fodder (Verb). To feed animals (with fodder).
(Redirected from Credit card number) A payment card number, or simply a card number, is the card identifier found on payment cards, such as credit cards and debit cards, as well as stored-value cards, gift cards and other similar cards. In some situations the card number is referred to as a bank card number.
The maximum length of a credit card number is 19 digits, with the maximum length of the account number field being 12 digits (initial six-digit issuer identifier minus the final digit check number). Each issuer has 1 trillion possible account numbers. The final digit of your credit card number is a check digit, similar to a checksum. The algorithm used to arrive at the correct digit is called the Luhn algorithm, after IBM scientist Peter Luhn. The check digit is used to confirm the initial digits of the card number.