Erdős problem 257 · problems.science

Let $A\subseteq\mathbb{N}$ be an infinite set. Is $\sum_{n\in A} \frac{1}{2^n - 1}$ irrational?

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Problem row: sha256:7493482876a1193d29943debea1b43ef0d62e14112ab0090891f7095ab018418
Metadata: sha256:1cd23cfdef14ea9176424211cb3ffef1c58cbbc6088d1113df78bb9af30f71f4
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:454c9a676460b56cd730943fbfd7801640d8efc96e88f4fe71f9c9fc41b6d038

Repository: sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection: sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit: 2415f78e850aeee50afdca525c6f2e0ea606f207