The following paper money has serial numbers that have mathematical significance or are just plan interesting or unusual.
| Obverse | Serial Number | Description |
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Binary |
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Palindrome |
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Repeated digits |
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Low number |
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All odd digits |
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All even digits |
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Lots of 8's, also all even |
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Lots of 1's, also all odd |
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Prime number |
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Prime number |
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The Euro uses a check digit serial number. The leading letter is converted to a number representing its place in the alphabet, a = 1, b = 2, etc. This number is added to the the next 11 digits and the remainder mod 9 should be 8. |
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This error bill shows the change in the serial number with the last digit serving as a check digit. The eighth number goes up from 3 to 4, while at the same time the last digit goes down from 4 to 3. |
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The Germany mark bill uses a check digit. |
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The serial number on this bill is pi, or at least pi multiplied by 100,000 and truncated. |