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Lehmer's totient problem
Decide whether some composite number n has Euler's totient φ(n) dividing n − 1, as every prime does.
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| 1 | # Board: Lehmer's totient problem |
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| 5 | **0** open issues, **0** that nobody works on, **0** worked on; **0** open pull requests. |
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| 7 | `main` at d4280d9: no checks on it yet. |