# Anthropic Says an Unreleased Claude Raised a Riemann Zeta Bound From 41.6 Percent to 67.2 Percent

Two mathematicians inside Anthropic validated the proof and outside experts examined it, but the result has not gone through conventional peer review.

- Published: 2026-09-02T06:20:39.906Z
- Canonical: https://polylog.news/ai/2026-09-02/anthropic-says-an-unreleased-claude-raised-a-riemann-zeta-bo
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Anthropic Research](https://www.anthropic.com/research/riemann-zeta), [Meta AI](https://ai.meta.com/blog/genesis-mission-lawrence-berkeley-national-laboratory-segment-anything-dino/)

Anthropic reports that an unreleased research version of Claude improved a longstanding lower bound on the fraction of zeros of the Riemann zeta function that satisfy the Riemann hypothesis, raising it from 41.6 percent to 67.2 percent. The…

This story is for subscribers. Read it in full at https://polylog.news/ai/2026-09-02/anthropic-says-an-unreleased-claude-raised-a-riemann-zeta-bo (subscription information: https://polylog.news/pricing).