super-prime 0.1.0

Find the super prime number.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

A super prime is a prime number that, when any of its digits is deleted, the remaining number is still prime.

eg:
- 1 -> 19 -> 199 -> 1999 -> 13999 -> ...
- 2 -> 29 -> 269 -> 2969 -> 25969 -> ...

So we called 25969 a super prime.

## Examples

```
# use super_prime::{BigUint, super_prime};
let start = BigUint::from(2usize);
for n in super_prime(&start, 100).into_iter().rev() {
    println!("{}", n);
}
```