RareBillSeven of a kind
Seven of the eight digits are identical, with one odd digit out: 77777775. One digit short of a solid, and worth a great deal less for that reason.
How rare is it? Exactly 720 of the 100,000,000 possible eight-digit serial numbers are seven-of-a-kinds — about 1 in 138,889. That figure is counted, not estimated: every possible serial was run through the same engine the RareBill app uses.
How to spot one
Count the repeats. Seven matching digits with a single stranger is the pattern; eight is a solid.
Example: 77777775 —
check this one in the lookup.
What it is worth
Well above face value, though the gap between this and a true solid is enormous — the last digit is most of the value.
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, seven-of-a-kinds rank #8 by scarcity.
Only double quads, millionth notes, true binaries 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.