Upper bound on the maximal length of consecutive integers with distinct divisor counts
TheoremDB P3342 · Candidate awaiting source review
Problem statement
Erdős Problem 945: For a positive integer , let denote the number of positive divisors of . For a real number , define to be the maximum integer such that there exists a natural number with and the values are all distinct. Is it true that there exists a function that is bounded in a neighborhood of infinity such that for all sufficiently large ?
Lean 4
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Progress & source assessment
Source-reported assessment, retrieved 8 September 2026. Frontier Science has not independently reviewed this status.
Open. No signed Lean verification is attached to this problem or its selected resolution.
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