Devin-assisted RSA-260 factoring
Cognition claims Devin helped build a GPU lattice siever that factored the 260-digit RSA-260 challenge in about 4,900 GPU-days (~$400k).
A showcase of long-horizon agent work on a research-grade systems task. Devin rewrote much of a GNFS pipeline (siever 'glas'), with an engineer steering through about 3,300 messages. The previous record was RSA-250 in 2020.
- Date
- Wednesday, 9 September 2026
- Lab
- Cognition
- Kind
- feature
- Access
- research preview
Figures
| Measure | Value | Measured by |
|---|---|---|
| Compute | ~4,900 GPU-days (~$400k) factors listed on FactorDB; RSA-2048 remains ~a billion times harder | company |
Company claim; I did not find independent confirmation beyond the post's FactorDB reference. The factors can be checked against the challenge number.
Sources
This record was checked against its sources on 6 October 2026. How we check