# discrete_log not working with multiple of base order

As title says, `discrete_log`

not working when I put in *some* multiple of the base order in the `order`

field. Specifically, take this for example:

```
sage: discrete_log(Mod(57, 91), Mod(8, 91), ord=4)
3
```

This works fine. Now, when I put in the group order for `ord`

instead of the base order:

```
sage: discrete_log(Mod(57, 91), Mod(8, 91), ord=72)
ValueError: No discrete log of 57 found to base 8
```

I suspect that this has to do with the multiplier of that base order having common factors with the base order itself. If I try to use a multiple of the base order with some number relatively prime to the base order:

```
sage: discrete_log(Mod(57, 91), Mod(8, 91), ord=36)
27
```

Otherwise it fails:

```
sage: discrete_log(Mod(57, 91), Mod(8, 91), ord=8)
ValueError: No discrete log of 57 found to base 8
```

Unrelated note: I cherrypicked the examples to show that:

`discrete_log`

only finds some exponent that satisfies, not necessarily the smallest one (and that's okay),- It's fine to give
`ord`

the base order multiplied with some factor from the group order, as long as that factor is relatively prime to the base order.