Cargo.toml

[package]
name = "rand"
version = "0.1.0"
authors = ["zhangsoledad <787953403@qq.com>"]


[dependencies.num-bigint]
git = "https://github.com/zhangsoledad/num-bigint"
features = ["rand"]

main.rs

extern crate num_bigint as bigint;

use bigint::{rand, RandBigInt};

fn main() {
  let mut rng = rand::thread_rng();
  let a = rng.gen_bigint(1000);
  println!("a : {:?}", a);
}