--- title: GitHub - 0x0mer/CasNum | daily.dev description: CasNum is a Python library that implements arbitrary precision arithmetic using compass and straightedge geometric constructions. Numbers are represented as... canonical: https://daily.dev/posts/github---0x0mer-casnum-icnzm15ii twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: GitHub - 0x0mer/CasNum | daily.dev og:description: CasNum is a Python library that implements arbitrary precision arithmetic using compass and straightedge geometric constructions. Numbers are represented as... og:url: https://daily.dev/posts/github---0x0mer-casnum-icnzm15ii og:image: https://api.daily.dev/og/posts/iCNzM15Ii.png og:image:alt: GitHub - 0x0mer/CasNum og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # GitHub - 0x0mer/CasNum **[Hacker News](https://daily.dev/sources/hn)** · 6 min read · 0 upvotes · 0 comments ## Summary CasNum is a Python library that implements arbitrary precision arithmetic using compass and straightedge geometric constructions. Numbers are represented as points on a plane, and all arithmetic and logical operations (add, multiply, divide, AND, OR, XOR) are performed through classical Euclidean constructions. As a proof of concept, the library is integrated into a modified PyBoy Game Boy emulator, replacing Python's native int so every ALU opcode runs entirely through geometric constructions. The result is a functional (if extremely slow) emulator capable of running Pokémon Red, with a ~15-minute boot time and ~0.5–1 FPS after caching. Performance is managed via Python's lru_cache. The project is openly described as a novelty built for the experience rather than practical use. ## Full article daily.dev links to this article rather than hosting it. 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