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How large is the largest prime factor of ?
Source: erdosproblems.com/368
No claim settles this problem.
Open, in the site's label (OPEN). Writing for the prime in question, the site's commentary credits four refereed bounds, which the corpus accepts on their publication as partial claims, none determining the order of : Pólya [Po18] proved (claim page (Pólya, 1918)), Mahler [Ma35] proved (claim page (Mahler, 1935)), Schinzel [Sc67b] observed that for infinitely many (claim page (Schinzel, 1967)), and Pasten [Pa24b] proved (claim page (Pasten, 2023)). The problem stays open: the site expects for all , and Erdős [Er76d] conjectured that for every there are infinitely many with .