Welcome!

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Power of two vs primeness

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The sentence you removed is "257,885,161 ... One more than the largest known prime number" (emphasis mine). You are correct that this power-of-two is not prime, but that's not what this sentence is saying. I re-inserted that statement in the article, and also its ref that explicitly supports it. Regarding your edit-summary itself, 2^1 is also prime, but obviously that's not relevant to the larger powers at issue here. DMacks (talk) 16:10, 25 June 2014 (UTC)Reply