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Let be the sequence of integers with at most prime factors. Is it true that
Source: erdosproblems.com/1139
A full solution has been claimed but not yet accepted. The statement is true.
The site labels the problem OPEN (page last edited 23 January
2026), with the explanation that the question cannot be settled by a finite
computation. The site's proof-claims tab carries one entry, a full claim by
Liam Price made with GPT Pro, as the tab gives it, first posted in the
site's thread on 2026-06-19 and filed on the tab on 2026-07-15, not accepted
by the site and recorded as pending on
Price's claim page (2026); it
gives the derived standing claimed.