Euler Phi Function of 527

From ProofWiki
Jump to navigation Jump to search

Example of Euler $\phi$ Function of Non-Square Semiprime

$\map \phi {527} = 480$

where $\phi$ denotes the Euler $\phi$ Function.


Proof

We have that:

$527 = 17 \times 31$


Thus:

\(\ds \map \phi {527}\) \(=\) \(\ds \paren {17 - 1} \paren {31 - 1}\) Euler $\phi$ Function of Non-Square Semiprime
\(\ds \) \(=\) \(\ds 16 \times 30\)
\(\ds \) \(=\) \(\ds 2^4 \times \paren {2 \times 3 \times 5}\)
\(\ds \) \(=\) \(\ds 2^5 \times 3 \times 5\)
\(\ds \) \(=\) \(\ds 480\)

$\blacksquare$