Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.
Updated
Claim. Theorem 1 of S. Laishram and T. N. Shorey, Grimm's conjecture on consecutive integers, Int. J. Number Theory 2 (2006), no. 2, 207--211: Grimm's conjecture holds for and for all , where and . That is, whenever and are all composite, there are distinct primes for . Theorem 2 reduces this to the maximal runs of composites between consecutive primes, and for . Its proof combines Philip Hall's theorem on distinct representatives with a Sylvester–Erdős argument and a Mathematica computation (card). The journal gives the June 2006 issue and no day, so the page is dated by the first of that month.
Covers. Every run of composites starting after , of any length, for which the problem's distinct primes exist. Larger are not covered, so the problem stays open.
Acceptance. The result appeared in a refereed journal, the International
Journal of Number Theory, in 2006: the refereed evidence. The site labels
the problem FALSIFIABLE, an open label, so its commentary's credit is not
reviewed evidence.