this post was submitted on 31 May 2024
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This is related to the the May 16 post, but takes only the prime indexed terms. Does it still diverge?

HintTransform the product into a sum


HintThe harmonic series 1 + 1/2 + 1/3 + ... 1/n +... diverges


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[–] [email protected] 4 points 4 months ago

Perhaps surprisingly, that's actually good enough since the sum of the prime reciprocals also diverges. However, I'm not letting you just assume that, and proving it is harder than the original problem.