Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.
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Claim. The note "The large-prime-divisor route to Erdős Problem #1201" (1 May 2026) works in the range , where an integer of size about has at most one prime factor above . For let be the number of primes dividing , and for let be the sum over of . The hypothesis the note names is that for every such , with . Its Theorem 1.3: assuming , the number of with is , so the natural density of that set exists and equals . With this gives the set of Problem 1201 the natural density , which exceeds for large; the natural-density variant recorded on the problem page would follow for . Theorem 1.4 says that the two-point case of the hypothesis is equivalent to the asymptotic for the number of with both and at most , at every scale . The note's abstract says that it does not claim an unconditional proof of the hypothesis and that the hypothesis is exactly the missing fixed-shift, all-scales input. The statements above are those of the note's Section 1; its proofs have not been checked.
Submission note. Posted to the site's forum by Przemysław Chojecki on 1 May 2026:
Thank you for pointing it out - it seems that proving the existence of the natural density in this case is quite hard. I couldn't really complete it in general though I've got
for . This is related to your
work with Teräväinen, work of Wang and a couple of other papers. Here's the note by GPT-5.5 Pro with these results and explicit conjecture that's missing to prove the natural density exists.
Hypothesis. for every and every : an unproven asymptotic for the joint distribution of large prime divisors of consecutive integers at every scale. The hypothesis at every is needed because Theorem 1.3 gives the density only at an where holds, and reaching for every needs an with , so arbitrarily large ; as implies for , the sets shrinking, that is the hypothesis at every . The note's Section 1 phrases its deduction as using the hypothesis for some chosen large, which as a statement of the hypothesis is too weak. Even granting the hypothesis for every and every , the natural-density form of the question for is not reached: the method needs , and a superset of a set of natural density at least need not have a natural density, so the conditional result is also partial in . Terence Tao wrote in the thread on 1 May 2026 that the note's results are conditional on an unproven and difficult hypothesis, the one the note names LPD, and the claimant confirmed the conditional nature of the results the same day. The unconditional lower-density statement, the precise Statement, is Chojecki's claim and is not conditional.
Standing. Przemek Chojecki posted the note in the site's thread on 1 May 2026, presenting it as written by GPT-5.5 Pro; Chojecki is the claimant as its submitter, and GPT-5.5 Pro is the system Chojecki names. The note itself carries no byline and, as of 2026-10-07, has no refereed publication, no formalization and no outside review, and the site's label is unchanged (OPEN). The claim is rejected: under the unproven hypothesis LPD it gives the natural-density variant only for , which implies the precise Statement only in that range, a result the unconditional claim already covers.
Depends on. Nothing on the wiki; the note's unconditional part rests on the same Matomäki--Radziwiłł input as the claim linked above.