bigint 3.0.0

Large fixed-size integers arithmetics
Documentation
# bigint

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[API Documentation](https://docs.rs/bigint/)

Fixed-sized integers arithmetic

```rust
extern crate bigint;
use bigint::U256;

fn main() {
	let mut val: U256 = 1023.into();
	for _ in 0..200 { val = val * 2.into() }
	assert_eq!(
		&format!("{}", val), 
		"1643897619276947051879427220465009342380213662639797070513307648"
	);
}