SDC test seeds per month run by Ripple across Meta's CPU fleet (Fleetscanner counted separately)
~2.5 billionobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Meta's 2022 CPU silent-error screening work. The monthly count belongs to Ripple; Fleetscanner's coverage is reported as a separate cumulative total. Not a GPU-fleet coverage or prevalence measurement. |
| As of | 2022 |
| Source | Meta Engineering (Detecting silent errors in the wild, 2022) · Ripple-testing section and comparison table: approximately 2.5 billion unique tests/test seeds per month |
| Review | checking…review by 2027-03-17 · standard cadence |
| Recorded changes | last 2026-09-04 · 3 revisions tracked |
| Claim id | sdc-test-seeds-per-month-across-meta-s-fleet |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.