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Show that 3412 2565 7246 5579 is an invalid American Express credit card number.

User Kavin Smk
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1 Answer

2 votes

Answer:

there is to many digits, an American Express card has only 15 digits while this card has 16.

Explanation:

Each brand starts with a specific number:

  • American Express card numbers start with the number 3.
  • Visa starts with 4.
  • Mastercard starts with 5.
  • Discover starts with 6.

Each brand has a specific number of digits in the card number:

  • Mastercard and Discover cards have 16 digits.
  • American Express has 15 digits.
  • Visa can have up to 19 digits but physical cards will usually have 16 digits.

The security code number (CVV or CVV2) for each card types are:

  • Visa, Mastercard and Discover have a 3-digit number on the back of the card in the signature panel.
  • American Express has a 4-digit number on the front of the card above the last 2 digits in the card number.
User Yooneskh
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