Erdős Problem 789 — qed.bot Claims, announcements and changes recorded against Erdős Problem 789. https://qed.bot/feeds/s/erdos-789.xml 2026-09-29T16:33:59Z qed.bot Fidelity regraded: Erdős Problem 789 urn:qed:change:fidelity:erdos:789:F2 2026-09-29T16:33:59Z The fidelity grade for Erdős Problem 789 moved from F0 to F2.