num-chrunchr

Overview Link to heading

num-chrunchr is a Rust CLI for working with very large integers when the useful question is not always “can I fully factor this in RAM?” but “what can I learn about this number with the representation and compute budget I actually have?”

Ambition Link to heading

I’m building this to become a sharp, reusable tool that I can rely on in real workflows: fast, well-scoped, and easy to operate.

What’s novel Link to heading

  • Opinionated defaults with room for power-user control.
  • Tight scope + strong ergonomics (the “small tool, big leverage” approach).

Highlights Link to heading

  • use the cheapest representation that still supports the next operation;
  • stream from disk when materializing a full big integer is unnecessary or too expensive;
  • emit structure reports and compressed descriptions even when full factorization is impractical.
  • streaming decimal operations on numbers stored as text files;
  • loading moderately sized values into BigUint when an in-memory upgrade is reasonable;

Stats Link to heading

  • Project page: /projects/num-chrunchr/
  • Primary language: Rust
  • Commits: 73
  • Created: 2026-01-31T09:29:16Z
  • Last updated: 2026-05-03T23:54:15Z