Brings number theory operations directly into Claude through an MCP interface. You get functions for computing GCD, prime factorization using algorithms like Fermat's method, and other number theoretic operations. The underlying Python library exposes these through simple function calls, which the MCP server wraps for use in conversations. Reach for this when you need to factor large integers, analyze divisibility properties, or perform modular arithmetic without writing boilerplate code. It runs via stdio transport and requires a pip install to get started.