Source authenticated

Erdős Problem #320

Let $S(N)$ count the distinct values of $\sum_{n\in A} 1/n$ over $A\subseteq\{1,\dots,N\}$. Estimate $S(N)$.

Exact FrontierDelta

Prior state unknown→proved

Scope and record

Occurred: Jul 1, 2026

Delta type: SOURCE CLAIM

Assumptions: VibeMathed verification: site-confirmed. Publication: announcement. AI contribution: ai-discovered. Imported under CC BY 4.0.

Canonical aliases: Erdős Problem #320 · Erdős #320 · Problem 320

Confidence: Not scored

Registry verification: site confirmed · announcement · resolved

Attribution

VibeMathed
registry · event recorded by

Young
human · human collaborator

Zhu
human · human collaborator

Luo
human · human collaborator

GPT-5.6 Sol
model · ai model contributor · OpenAI

Lineage and corrections

This event attributed to Young

This event attributed to Zhu

This event attributed to Luo

This event attributed to GPT-5.6 Sol

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