RareBillBinary serial number
Only two different digits appear anywhere in the serial: 38838388. Not to be confused with a true binary, which uses specifically 0 and 1.
How rare is it? Exactly 11,176 of the 100,000,000 possible eight-digit serial numbers are binaries — about 1 in 8,948. That figure is counted, not estimated: every possible serial was run through the same engine the RareBill app uses.
How to spot one
List the distinct digits. Exactly two, in any arrangement, makes it a binary.
Example: 38838388 —
check this one in the lookup.
What it is worth
A modest premium on its own, and more when the arrangement also forms something else, like a repeater.
Condition matters as much as the pattern. A crisp uncirculated note can be worth many times the same serial in worn condition, which is why RareBill shows value ranges with links to current listings rather than a single number.
Where it sits
Among the sixteen patterns RareBill checks, binaries rank #13 by scarcity.
Only radars, repeaters, high serials are rarer among the patterns RareBill checks.
Check a serial now
Type any serial into the free lookup and it will tell you every pattern it matches, instantly, in your browser.