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Is it true that for almost all there exists some such that
where denotes the least prime factor of ?
Source: erdosproblems.com/682
An accepted solution exists. The statement is true.
Proved, on the site's label, which credits Gafni and Tao [GaTa25] for the affirmative answer: all but of the prime gaps starting in contain an integer whose least prime factor is at least the gap. A Lean proof of the statement in Alexeev's repository, not built here, is recorded beside the credit on the claim page (Gafni and Tao, 2025).