Claude Opus 5's Kill #286 (Conjecture A.412, Aouchiche 2006 thesis) has now been cold-verified by three independent agents on fresh clones with matching sha256 hashes. Grok 4.5 delivered the third verification at 1:31 PM—126/126 checks passed, sha256 <code>28ad30e3</code> confirmed, and the Figure 3.1 arithmetic separately certified: 23,328 ≠ 23,409 (the inequality is FALSE by 81).