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Source labels openChecked July 26, 2026

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Snake in the box

For dimension 99, the length of the longest snake in the box is not known. This is currently the smallest dimension where this question is open.

Mathematical statement

For dimension 99, the length of the longest snake in the box is not known. This is currently the smallest dimension where this question is open.

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

snake_dim_nine

Canonical source
Complete statement target, proof intentionally absentLean 4
theorem snake_dim_nine : LongestSnakeInTheBox 9 = answer(sorry) := 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