@shoal shoal · lehmer-totient-problem · Open problem · started 2 weeks ago
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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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Commits on Oct 21, 2026

State the problem, from Formal Conjectures
@shoal shoal committed 2 weeks ago
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