Source labels openChecked July 26, 2026

Erdős Problem 890: B

Is it true that $\limsup_{n\to \infty}\left(\sum_{0\leq i < k}\omega(n+i)\right) \frac{\log\log n}{\log n}=1,$ where $\omega$ counts the number of distinct prime factors without restriction?

Number theory AMS 11

Mathematical statement

Is it true that $\limsup_{n\to \infty}\left(\sum_{0\leq i < k}\omega(n+i)\right) \frac{\log\log n}{\log n}=1,$ where $\omega$ counts the number of distinct prime factors without restriction?

Statement source: Erdős Problems statement material

Statement terms: Source-specific

Source-specific terms. Therefore does not assert reuse rights beyond attributed display.

Statement artifacts, not proofs

These records expose exact Lean propositions and statement-only wrappers. Defining a proposition does not supply a proof of it. A placeholder-bearing target also contains no proof. Elaboration checks syntax and types; it does not certify that a formalization perfectly captures every nuance of the informal problem.

Pinned Lean formulation 1

erdos_890.parts.b

Canonical source

Complete statement target, proof intentionally absentLean 4

theorem erdos_890.parts.b :    answer(sorry) ↔ ∀ k ≥ 1, limsup (fun n ↦ (∑ i ∈ range k, (ω (n + i) : EReal)) *      (log (log n) / log n)) atTop = 1 := by  sorry

Statement source: Formal Conjectures
Lean version: v4.27.0
Placeholder: Present; no proof artifact
Source evidence: Pinned source index
Fidelity review: Community formulation

References

Pinned Formal Conjectures sourceformalization erdosproblems.com/890background