ID NAME QUALITY USERS ACC % DIFFICULTY C I
12914 Totient Extreme   33 1391
8
12
4141 Euler Totient Function   119 8489
8
11
22268 Euler Totient Function Sieve   23 275
26
20
12295 Smallest Inverse Euler Totient Function   6 118
27
21

#totient

Euler's totient function

https://en.wikipedia.org/wiki/Euler%27s_totient_function http://mathworld.wolfram.com/TotientFunction.html https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/euler-s-totient-function-phi-function https://oeis.org/A000010