Not consecutive AA membership numbers

Discussion in 'American Airlines AAdvantage' started by Tiki, Sep 4, 2006.

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  1. Tiki

    Tiki Member

    Jul 21, 2004
    449
    32
    BNE
    Well I finally signed us up for AAdvantage since there aren't likely to be any referral bonuses. It took less than 2 minutes between doing mine and doing my husband's and we didn't get consecutive AAdvantage numbers. Very AAnnoyed! :rolleyes:
     

  2. straitman

    Moderator

    Apr 27, 2003
    16,604
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    How far apart are the numbers?

    With a company the size of AA it's quite possible that a few others will slip through in two minutes :!:
     
  3. Altair

    Altair Active Member

    Aug 22, 2006
    803
    82
    Wellington
    You may never get consectutive numbers as a security feature. There are many organizations that will not issue consecutive numbers so people cannot just add 1 to their own number, eg. banks their customer numbers and bank account numbers are produced using an algorithm where all the numbers will result in a validation number (like add the first 2 numbers multiply by the third etc will result in an answer of 3). Imagine if credit card numbers were consecutive, you would just add 1 to your account and you would know the expiry date (strong chances it is the same) of the other card.
     
  4. JohnK

    JohnK Veteran Member

    Mar 22, 2005
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    That is right. The validation number is commonly called the "check digit" and this digit is usually added to the end or beginning of the number. The most common method used to add a "check digit" is the MOD 10 method.
     
  5. oz_mark

    oz_mark Enthusiast

    Jun 30, 2002
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    Of course, if you know how the algorithm works you can generate your own. Or, if you know which transposition errors it doesn't pick up, if you have the right credit card number, you can shuffle the right numbers and the check digit will still be the same!
     
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