I have a question regarding number formatting?

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Xander1

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Joined
Nov 28, 2006
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52
When I enter a 16 digit credit card number, excel flips that last numer to a different number, usually a 0. Why, and how can I fix this?
 

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If you have a cell format as number it only recognises up to 15 significant figures. Format cell as text
 
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