Source labels openChecked July 26, 2026

Firoozbakht's conjecture

Firoozbakht's conjecture* The inequality $\sqrt[n+1]{p_{n+1}} < \sqrt[n]{p_n}$ holds for all prime numbers $p_n$ .

Number theory AMS 11

Mathematical statement

Firoozbakht's conjecture* The inequality $\sqrt[n+1]{p_{n+1}} < \sqrt[n]{p_n}$ holds for all prime numbers $p_n$ .

Statement source: Wikipedia statement material

Statement terms: CC-BY-SA-4.0

Attributed source material. Reuse must follow the linked attribution and share-alike terms.

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

firoozbakht_conjecture

Canonical source

Complete statement target, proof intentionally absentLean 4

theorem firoozbakht_conjecture (n : ℕ) :    firoozbakhtSeq (n+1) < firoozbakhtSeq n := 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 Wikipediabackground primepuzzlesbackground