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OpenAI reports: Irrationality of Catalan’s constant

The manuscript reports a proof that Catalan’s constant is irrational.

Sources for this record

What was already known

Computing many digits does not establish irrationality; the target is an argument excluding every rational value.

What changed and why it matters

Resolves the longstanding irrationality question for Catalan’s constant.

The AI contribution

OpenAI attributes the manuscript to an internal frontier model. This entry does not infer the exact human contribution to this individual result from the release-wide description.

Limitations

Irrationality alone does not establish transcendence or an optimal rational-approximation exponent. Preprint. AIProofWatch reviewed the source statement and scope, not the full proof, and has not independently run a formal checker.

Verification evidence

Evidence labels show what supports the claim. Importance rates its impact if correct.

Author claim

Reported theorem in the pinned manuscript. This records the claim, not an independent proof check.

Accessible artifact / proof

Manuscript proof is accessible. Formalization availability alone is not labelled as successful formal verification.

Correction and publication history

2026-10-11 · amendment

Editorial importance reassessment: rate the scoped impact if correct independently from verification. The claim, limitations, sources, and verification evidence are unchanged.

Read this published revision