For a positive integer $n$, $\phi(n)$ denotes the number of positive integers less than or equal to $n$ that are relatively prime to $n$.

What is $\phi(191)$?

LiIIiam0216 Jul 26, 2024

#1**+1 **

Let's set up for a really cool function.

First, note that \(191=191*1\)

Now, we use Euler's Totient Function. We have

\(\phi{191} = 191/ ( 191) * (191-1) = 190\)

The answer is 190

Thanks! :)

NotThatSmart Jul 26, 2024

#1**+1 **

Best Answer

Let's set up for a really cool function.

First, note that \(191=191*1\)

Now, we use Euler's Totient Function. We have

\(\phi{191} = 191/ ( 191) * (191-1) = 190\)

The answer is 190

Thanks! :)

NotThatSmart Jul 26, 2024