{"schema":"vela.problem-packet.v0.1","problem":937,"statement":"Are there infinitely many four-term arithmetic progressions of coprime powerful numbers (i.e. if $p\\mid n$ then $p^2\\mid n$)?","status":"solved","seam":"raw","closureRoutes":[],"obligations":[],"attestations":[],"attempts":[],"velaLean":[],"oeis":[],"generated_note":"derived view; the signed event log is the source of truth (vela check / vela reproduce)"}