RareBillSuper repeater
The same two digits repeated four times over: 45454545. It is a repeater and a binary at once, which is why it sits so high in the rarity order.
How rare is it? Exactly 90 of the 100,000,000 possible eight-digit serial numbers are super repeaters — about 1 in 1,111,111. That figure is counted, not estimated: every possible serial was run through the same engine the RareBill app uses.
How to spot one
Check whether the serial is just two digits alternating the whole way across.
Example: 45454545 —
check this one in the lookup.
What it is worth
Well above an ordinary repeater, because it satisfies several patterns at once and reads as obviously unusual even to non-collectors.
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, super repeaters rank #3 by scarcity.
Only ladders, solids 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.