What does "Ord" mean?

Question

I have a question as follows:

Solve for $x: ord\:29(x)=7$.

I have never seen Ord before I have an exam and something like this will come up so can someone just tell me how I would go about doing this?

give a reference on such a notation – janmarqz Jan 14 '14 at 21:33 — janmarqz, Jan 14 '14 at 21:33

score 4 · Accepted Answer · answered Jan 14 '14 at 21:34

4

This is the multiplicative order (http://en.wikipedia.org/wiki/Multiplicative_order) which means that $x^7 \equiv 1 \mod 29$ where, in this case, $7$ is the smallest number satisfying this equation.

answered Jan 14 '14 at 21:34

Marc

755

I agree with @Tim. It would just be a guesswork afterall – Hawk Jan 14 '14 at 21:38

What does "Ord" mean?

1 Answers1