Computer Science, Cryptography.
and 2. So we know that the order of the subgroups will be 1, 4 and 2. We can prove this out: Here, we can see that for mod 5, we have groups of order 1 (powers of 1), groups of order 4 (powers of 2 and 3) and groups of order 2 (powers of 4). These cyclic subgroups have a particular property. If a