RareBillSolid serial number
Every one of the eight digits is the same — 77777777. There is no rarer shape a serial can take, and solids are the notes collectors chase hardest.
How rare is it? Exactly 10 of the 100,000,000 possible eight-digit serial numbers are solids — about 1 in 10,000,000. That figure is counted, not estimated: every possible serial was run through the same engine the RareBill app uses.
How to spot one
Look at the eight digits and check they never change. A single different digit makes it a 7-of-a-kind instead, which is a real find but a different one.
Example: 44444444 —
check this one in the lookup.
What it is worth
Solids command the largest premiums of any pattern, and a solid in uncirculated condition is a headline note rather than pocket change.
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, solids rank #2 by scarcity.
Only ladders 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.