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Erdős·erdos:401

Erdős Problem 401

problem formal record: solved source: proved (Lean)no F2 declared

No independent check recorded yet. A formal artifact, declaration or published object is attached, but no rebuild of it is recorded here.

Fidelity F2: The statement corpus cites this proof against its own statement.

number theory, factorials·Source

AI activity

How grades work
Aristotle, GPT-5.2 Pro

2026-01-11·with Boris Alexeev, Kevin Barreto, Liam Price, Nat Sothanaphan

Full solution (Lean); solution to variant problem

full A1 collaborative V2 artifact F2 declared
Reasoning and sources

Autonomy

AI collaborating with humans

Does the formal statement say what was claimed?

F2 declared The statement corpus cites this proof against its own statement.

Computed from what the project declares and what the register holds, never from reading the mathematics. How fidelity is graded.

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All discussion

Discussion and bounties for this problem load here.

Formal material

Formal statements · 1
Cited proofs · 1

Recorded elsewhere

Compare the registries
  • vibemathed — Erdős Problem #401

    checked·machine-led·their labels: lean-verified, ai-discovered

Also known as · 3
  • https://www.erdosproblems.com/401
  • https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/401.lean
  • FormalConjectures/ErdosProblems/401.lean