Co2Fe15 R-3m, best of 200 random trials (ORB -8.3087 eV/atom)

Lowest-energy Co2Fe15 cell (17 atoms) from 200 random PyXtal + ORB trials: 2 meV/atom below the ggen database's P-1 entry and the same energy the January 2026 P222 result reached. An ordered bcc-derived Fe-Co arrangement (R-3m at symprec 0.1, C2/m at 0.01). 13 distinct basins within 50 meV/atom, 10 of them hit only once: an alloy-ordering landscape rather than a single ground state.