P248
projecteuler.net

Euler's Totient Function Equals 13!

ℹ️Published on Saturday, 6th June 2009, 01:00 am; Solved by 1472;
Difficulty rating: 70%

The first number $n$ for which $\phi(n)=13!$ is $6227180929$.

Find the $150\,000$th such number.



Soluzione

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