Erdős Problem #267
If $n_1 < n_2 < \cdots$ with $n_{k+1}/n_k \ge c > 1$, must $\sum_k 1/F_{n_k}$ be irrational? The proposed proof closes the range $1 < c < 2$ left open by earlier criteria.
Exact FrontierDelta
Scope and record
Occurred: Jul 13, 2026
Delta type: SOURCE CLAIM
Assumptions: VibeMathed verification: lean-verified. Publication: announcement. AI contribution: ai-discovered. Imported under CC BY 4.0.
Canonical aliases: Erdős Problem #267 · Erdős #267 · Problem 267
Confidence: Not scored
Registry verification: lean verified · announcement · candidate
Attribution
VibeMathed
registry · event recorded by
GPT-5.6 starships (Claude Fable 5 reviewer)
model · ai model contributor · OpenAI / Anthropic
Lineage and corrections
This event attributed to GPT-5.6 starships (Claude Fable 5 reviewer)