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Erdős·erdos:390

Erdős Problem 390

conjecture formal record: mixed source: open (Lean) F0 no formal statement

No formal proof attached. Any claim here rests on a write-up or a report.

Fidelity F0: Absent. No formal statement is attached to the result.

number theory, factorials·Source

AI activity

How grades work
GPT-5.5 Pro

2 May 2026·with Samuel Mausberg

Candidate partial result

candidate A1 V0 F0
Reasoning and sources

Autonomy

AI collaborating with humans

Claimed on erdosproblems.com

1

Proof claims posted on erdosproblems.com, which says that listing a claim “is no guarantee of proof correctness”. The register records who claims what, with which systems, and links to each claim there. Nobody has examined them, and none counts in the register's totals.

Shouqiao Wang

a full proof claimed·19 Jul 2026·using GPT-5.6 Sol·2 comments there

Proof

candidateA? V0

Fidelity

How fidelity is graded

F0 no formal statement. Absent. No formal statement is attached to the result.

Follow and discuss

All discussion

Discussion and bounties for this problem load here.

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Formal material

Formal statements · 1
Cited proofs · 0

No proof artifact cited by the formal record.

Recorded elsewhere

Compare the registries
  • vibemathed — Erdős Problem #390: the second-order constant for f(n)−2n

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

Also known as · 3
  • https://www.erdosproblems.com/390
  • https://github.com/google-deepmind/formal-conjectures/blob/main/FormalConjectures/ErdosProblems/390.lean
  • FormalConjectures/ErdosProblems/390.lean

Cite this record

qed.bot, “Erdős Problem 390”, https://qed.bot/s/erdos-390, as of 30 Sep 2026.

This record as plain text, with each claim, its grades and its sources.