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Thread: Hidden information that lurks in your amex card number
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Old Oct 21, 2003 | 7:10 am
  #12  
TribeFlyer
 
Join Date: Feb 1999
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Modulo 10 or 11--so I was off by one digit. (I figured the formulas weren't identical, which is why I used the term "similar".) Thanks for the clarification, Richard!
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