Binary Serial Number
Checker & Value Guide
A Binary uses only two unique digits — like 10101010 or 11100111. Worth $30–$300+.
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What Is a Binary Serial Number?
A Binary serial number uses exactly two unique digits across its 8 positions. The digits don't have to be 0 and 1 — "binary" just means two. Bills like 33773377 and 29292929 both qualify.
Binary Note Value Guide (2025)
| Type | Example | Circulated ($1) | Uncirculated ($1) |
|---|---|---|---|
| Standard Binary | 29292929 | $30 – $80 | $80 – $150 |
| Clean Alternating | 01010101 | $60 – $150 | $150 – $400 |
| Binary + Radar | 10000001 | $100 – $250 | $250 – $600 |
| Binary + Star Note | 10101010* | $80 – $200 | $200 – $500+ |
Binary vs Trinary vs Solid
These three patterns form a family based on how many unique digits appear:
- Solid: 1 unique digit (77777777) — rarest, worth $500–$5,000+
- Binary: 2 unique digits (10101010) — worth $30–$500
- Trinary: 3 unique digits (12312312) — worth $5–$40
💡 Binary Bills That Also Match Other Patterns
Some Binaries double as other fancy types, which multiplies their value. For instance, 11111110 is both Binary and Near-Solid; 10000001 is both Binary and Radar. Our checker catches all overlapping patterns automatically.
Related patterns
Frequently Asked Questions
Everything you need to know about collecting fancy serial numbers.
What is a Binary serial number?
A Binary serial number is one that uses only two unique digits across all 8 positions. Classic examples are 10101010, 11100111, and 22992299. The 'binary' name refers to having only two options — not specifically 0 and 1.
How much is a Binary bill worth?
Standard Binary notes typically sell for $30–$100 on a $1 bill in circulated condition, and $100–$300 uncirculated. Rare combinations (like 01010101 or 10000001) with aesthetic appeal can command $200–$500+.
How is Binary different from Trinary?
Binary uses exactly 2 unique digits; Trinary uses exactly 3. Binary is rarer and more valuable. If a bill has 4 or more unique digits, it's neither. Our checker classifies this automatically.
Is a Solid serial number considered Binary?
No. A Solid has only 1 unique digit (like 77777777), so it's classified as Solid, not Binary. Solids are rarer and more valuable than Binaries. See our solid serial number guide for values on those.
How rare are Binary serial numbers?
Moderately rare. Depending on which digits appear, binary patterns show up in roughly 1 out of every 3,000–5,000 notes — more common than Radars but far less common than typical serial numbers.
Are all Binary numbers worth the same?
No. Binaries that also form other patterns (like 10000001 which is also a Radar, or 11111110 near-Solid) are worth substantially more. Visually 'clean' alternating patterns like 01010101 also fetch higher prices than messier Binaries like 19919199.
Have a specific question not answered here? Check our detailed Value Guide above.