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Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.

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Claim. For every prime p≤1018p\le10^{18}, 4/p4/p is a sum of three unit fractions. The statement is the authors' report of a completed computation in Further verification and empirical evidence for the Erdős-Straus conjecture (arXiv:2509.00128v1, 29 August 2025), Section 2, recorded on the library's result page: a modular-filter search extending Salez's verification for primes up to 101710^{17}, through 21015142101514 residue classes modulo 2587877292025878772920 and 140000140000 prime filters. The paper allows repeated terms.

Covers. Every nn with 2<n≤10182<n\le10^{18} for Problem 242: the primes by the reported computation, the composites through a prime factor, with the terms made distinct as the problem page's Formulation records. Every larger nn is not covered.

Depends on. No page of this wiki.

Standing. Claimed. The preprint is a computation report without a journal reference; the computation was not rerun by the corpus and no one has checked it. The site's commentary cites it for the verification of all n≤1018n\le10^{18}, but the site labels the problem FALSIFIABLE, an open problem, so the citation is no reviewed evidence.