num-bigint

crate documentation minimum rustc 1.31 build status

Big integer types for Rust, BigInt and BigUint.

Usage

Add this to your Cargo.toml:

toml [dependencies] num-bigint = "0.3"

Features

The std crate feature is enabled by default, and is mandatory before Rust 1.36 and the stabilized alloc crate. If you depend on num-bigint with default-features = false, you must manually enable the std feature yourself if your compiler is not new enough.

Random Generation

num-bigint supports the generation of random big integers when the rand feature is enabled. To enable it include rand as

toml rand = "0.7" num-bigint = { version = "0.3", features = ["rand"] }

Note that you must use the version of rand that num-bigint is compatible with: 0.7.

Releases

Release notes are available in RELEASES.md.

Compatibility

The num-bigint crate is tested for rustc 1.31 and greater.

Alternatives

While num-bigint strives for good performance in pure Rust code, other crates may offer better performance with different trade-offs. The following table offers a brief comparison to a few alternatives.

| Crate | License | Min rustc | Implementation | | :--------------- | :------------- | :-------- | :------------- | | num-bigint | MIT/Apache-2.0 | 1.31 | pure rust | | [ramp] | Apache-2.0 | nightly | rust and inline assembly | | [rug] | LGPL-3.0+ | 1.37 | bundles [GMP] via [gmp-mpfr-sys] | | [rust-gmp] | MIT | stable? | links to [GMP] | | [apint] | MIT/Apache-2.0 | 1.26 | pure rust (unfinished) |

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.