Rust code shared from the playground

Euler Problem 5

extern crate num_integer;
use num_integer::Integer;

// run at http://play.integer32.com/?gist=6e4b93f907407f67704430e60f771e1f&version=undefined

fn main() {
    let e5 = euler5();
    assert_eq!(e5, 232792560);
    println!("Euler5 {}", e5);
}

fn euler5() -> u64 {
    (2u64..20).fold(1, |acc, x| acc.lcm(&x))
}