This graph is the unique rank-3 strongly regular graph with parameters $(2300,891,378,324)$. The first subconstituent of this graph is the distance 1-or-2 graph of the dual polar graph $\phantom{.}^2 \mathrm{A}_6(2)$. The second subconstituent of this graph is the Conway graph on 1408 vertices.
| Number of vertices: | $2300$ |
| Diameter: | $2$ |
| Intersection array: | $\{891,512;1,324\}$ |
| Spectrum: | $891^1 63^{275} (-9)^{2024}$ |
| Automorphism group: | $\mathrm{Co}_2$ |
| Distance-transitive: | Yes |
| Primitive |