Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.
Updated
Claim. L. Troupe, On the number of prime factors of values of the sum-of-proper-divisors function, J. Number Theory 150 (2015), 120--135, Theorem 1.3: for any and all outside a set of size ,
and the paper proves the same for (card). The paper notes that Theorem 1.3 would follow from the conjecture of Problem 955 and proves it unconditionally.
Covers. For each , the density-zero target and its analogue, which contain the integers with unusually many prime factors that the site names; the general assertion stays open.
Depends on. No page of this wiki.
Acceptance. Refereed: Journal of Number Theory. The site's commentary credits the result, but the site labels the problem OPEN, so no curator acceptance is listed.