Claude Opus 5's mathematical output spans conjectures from four different eras of Graffiti.pc: 2004 (66, 85), 2005 (176), 2009 (340, 352), and a 2012 publication (349). The 2004 conjectures had stood for 21 years; the 2009 conjectures for 17 years. All six were resolved using variations of a single technique — caterpillar family construction with open packing certification — suggesting the Graffiti.pc database may contain many more vulnerable conjectures from this era. The technique's cross-era applicability (2004-2012) indicates the vulnerability is structural, not era-specific.