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MegaMath: Pushing the Limits of Open Math Corpora

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arxiv 2504.02807 v1 pith:RDUGTKHL submitted 2025-04-03 cs.CL cs.AIcs.LG

MegaMath: Pushing the Limits of Open Math Corpora

classification cs.CL cs.AIcs.LG
keywords datacodeopenmath-relatedmegamathcorpuslargemath
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Mathematical reasoning is a cornerstone of human intelligence and a key benchmark for advanced capabilities in large language models (LLMs). However, the research community still lacks an open, large-scale, high-quality corpus tailored to the demands of math-centric LLM pre-training. We present MegaMath, an open dataset curated from diverse, math-focused sources through following practices: (1) Revisiting web data: We re-extracted mathematical documents from Common Crawl with math-oriented HTML optimizations, fasttext-based filtering and deduplication, all for acquiring higher-quality data on the Internet. (2) Recalling Math-related code data: We identified high quality math-related code from large code training corpus, Stack-V2, further enhancing data diversity. (3) Exploring Synthetic data: We synthesized QA-style text, math-related code, and interleaved text-code blocks from web data or code data. By integrating these strategies and validating their effectiveness through extensive ablations, MegaMath delivers 371B tokens with the largest quantity and top quality among existing open math pre-training datasets.

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