# rust-num/num

A collection of numeric types and traits for Rust.

Repository: https://github.com/rust-num/num
Canonical: https://ross.abutalabs.com/products/num
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: rust, number, trait, numeric-types, num
Last push: 2026-07-07T20:19:35+00:00

## Health v2 (maintenance only)
Score: 73/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 91, release rhythm 35, longevity 100
- inputs: {"age_days": 4369, "days_push": 57, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1220, forks 150 (observed 2026-08-28T04:04:01.879156+00:00)

## What it is
A meta-crate for Rust that re-exports a collection of numeric types and traits, including big integers, rationals, complex numbers, and generic integer traits. It supports no_std environments and generic programming over numeric properties.

## Use cases
- do arbitrary-precision integer arithmetic in Rust
- work with rational numbers and fractions
- use complex numbers in numeric code
- write generic functions over integer types
- use numeric traits in no_std embedded Rust

## When to choose
- you need bignum, rational, or complex number support in Rust
- you want generic numeric trait abstractions like Integer or Num
- you need numeric libraries that work without the standard library

## When to avoid
- you only need one sub-crate and want to minimize dependencies
- you need floating-point linear algebra or matrix math
- you are not programming in Rust

## Facets
- artifact type: library
- maturity: stable
- function: math
- domain: mathematics
- platform: rust, cross-platform
- tags: numeric-types, bigint, complex-numbers, rational-numbers, traits, no-std, meta-crate

## Member repositories
- rust-num/num (main) score 73

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:01.879156+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:16:09.936109+00:00, confidence not recorded.
  - readme: https://github.com/rust-num/num (fetched 2026-08-28T04:04:01.879156+00:00, sha ad24800539c6)
  - registry_crates: https://crates.io/api/v1/crates/num (fetched 2026-08-29T12:24:20.470206+00:00, sha 8c1963cb1dc8)
- Data as of 2026-08-30T08:39:29.467469+00:00.