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Erdős Problem #306

If $a/b \in \mathbb{Q}_{>0}$ and $b$ is squarefree, can $a/b$ always be written as a finite sum of reciprocals of distinct products of two distinct primes?

Exact FrontierDelta

Prior state unknownproved

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Occurred: Jun 19, 2026

Delta type: SOURCE CLAIM

Assumptions: VibeMathed verification: lean-verified. Publication: announcement. AI contribution: ai-assisted. Imported under CC BY 4.0.

Canonical aliases: Erdős Problem #306 · Erdős #306 · Problem 306

Confidence: Not scored

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Erdős Problem #306 — Mathematical Frontier Network