Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.
Updated
Claim. Theorem 1 of J. She, Nonexistence of consecutive powerful triplets around cubes with prime-square factors, Integers 25 (2025), Paper No. A103: there are no consecutive powerful numbers , , with prime and integers. Corollary 1 of the paper: for primes and integers with , the equation has no solution. The proof is a case analysis on the common factors of and , using the -adic valuation, Thue equations and the integer points of the Mordell curve (card). The page is dated by the arXiv posting of 2025-07-07; the journal published the paper on 2025-11-25.
Covers. Triples centered at a cube whose outer members are both a prime squared times a cube, a partial no to the question of Problem 364. Triples of other shapes, and those whose middle member is not a cube, are untouched.
Acceptance. Refereed in Integers (received 2025-07-09, accepted
2025-10-22): the refereed evidence. The site labels the problem
VERIFIABLE, an open label, so its commentary's mention of the paper is not
reviewed evidence.