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No LLM Solved Yu Tsumura's 554th Problem

★ ★ ★ ★ ☆

Paper Summary

Paperzilla title
AI Still Can't Do ALL the Math: Popular LLMs Flunk a Known Group Theory Challenge

This paper challenges recent optimism about large language models' (LLMs) mathematical reasoning, demonstrating that leading commercial and open-source LLMs failed to solve Yu Tsumura's 554th problem. Despite being within the International Mathematical Olympiad's scope and having a publicly available solution pre-dating LLMs, models struggled with the intricate symbolic manipulation required, suggesting fundamental limitations in deep search and algebraic error prevention.

Explain Like I'm Five

Even super smart AI math programs can't solve every tricky math problem, especially one needing careful step-by-step symbol moving. This shows they still have a lot to learn about really deep thinking.

Possible Conflicts of Interest

None identified

Identified Limitations

Susceptibility to Goodhart's Law
The paper acknowledges that once this specific problem is publicized, LLM developers might optimize models directly for it, potentially leading to a solution without genuinely improving general mathematical reasoning, thus undermining the long-term impact of this finding.
One-Shot Evaluation Protocol
The study evaluated models based on a single attempt. Commercial LLMs might employ internal "repeated evaluation" or "majority voting" strategies, which could potentially yield correct solutions if given multiple tries, suggesting the end-user experience might sometimes differ.
Limited Scope of Models Examined
The analysis focused on publicly available and widely deployed LLMs. The authors cannot definitively rule out that specialized "boutique models" or those not yet publicly released could reliably solve the problem.
Exclusion of External Tools/RAG
To specifically assess reasoning, the study intentionally prohibited web searches (RAG) and access to symbolic solvers. Allowing such tools might enable an LLM to find the existing solution or derive it, though this would test tool-integration rather than raw reasoning.

Rating Explanation

The paper presents a robust and timely counter-argument to exaggerated claims of LLM mathematical prowess, using a clearly defined and publicly verifiable problem. Its methodology for evaluating "off-the-shelf" LLMs is sound for its stated purpose, and the authors transparently discuss the study's limitations, adding significant value to the ongoing discourse on AI capabilities.

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Original Title: No LLM Solved Yu Tsumura's 554th Problem
Uploaded: October 05, 2025 at 11:56 AM
Privacy: Public