This graph is the unique rank-3 strongly regular graph with parameters $(256,102,38,42)$.
| Number of vertices: | $256$ |
| Diameter: | $2$ |
| Intersection array: | $\{102,63;1,42\}$ |
| Spectrum: | $102^1 6^{153} (-10)^{102}$ |
| Automorphism group: | $2^8:\mathrm{PSL}(2,17)$ |
| Distance-transitive: | Yes |
| Primitive |