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Old 2018-02-26, 18:21   #2
CRGreathouse's Avatar
Aug 2006

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Let me see if I understand. You're trying to estimate the number of primes in an interval which is a below (30n + 1)^2, and your estimate is that if the interval has length L, there are about
\[L\prod_{7\le p\le 30n+1}\frac{p-1}{p}\]
primes. Is this right?
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