This factor reports whether a ranking result’s entire host name is exactly one digit. It returns a binary 1 or 0, and because the whole host must equal a single digit, essentially every real-world host scores 0 — including hosts that legitimately contain numbers.
| Factor ID | RG-SRP-024 |
|---|---|
| Family | Search Result URL |
| Measurement | Binary presence (0 / 1) |
| Measured zone | Parsed result URL |
What it measures
For each result in a measured SERP set, RankGear derives the host name from the parsed result URL and checks a single condition: whether the entire host name is exactly one digit. It is a presence flag, not a count — it does not tally how many digits appear, or where they sit, inside the host.
How RankGear measures it
RankGear applies the legacy full-string regular expression \d against the stored host name. Because the match is anchored to the whole string rather than a substring search, the host has to be a single digit for the factor to return 1. As a result, realistic host names return 0 even when they contain digits — the pattern never matches a multi-character host. This behavior intentionally preserves the published legacy math so scores stay comparable across versions.
| Value | Meaning |
|---|---|
| 1 | The entire parsed host name is exactly one digit (does not occur for valid real-world hosts). |
| 0 | The host is anything other than a single digit — every normal host, including ones that contain numbers. |
How to optimize it
Do not change a host to optimize this effectively constant legacy factor. The live, legacy-compatible implementation returns 0 for valid real-world hosts regardless of the digits they contain, so there is nothing to move. Treat it as an observed field in the result set, not a target to chase.
Important considerations
- This reports URL structure, not content quality or ranking causation.
- Values depend on RankGear’s parsed URL components and TLD table, so host derivation can differ from a naive read of the raw URL.
- The display name is broader than the live full-string test — it suggests “has numbers” anywhere, but the implementation only returns 1 when the whole host is a single digit.
- A normal host that contains digits still returns 0.
- URL and domain changes can carry material migration risk, so host decisions should be driven by brand, trust, and migration cost — not by this factor.
- Correlation is not causation: this flag describes a host characteristic within a measured result set and does not, on its own, move or guarantee a ranking position.
Related factors
Part of the Factors reference · how RankGear measures · glossary.