> I presume that someone has figured out a much better formula, still

http://primes.utm.edu/top20/page.php?id=1

> consistent with the prime number theorem,

> for estimating the number of twin primes less than a given integer.

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> I presume that someone has figured out a much better formula, still

http://primes.utm.edu/top20/page.php?id=1

> consistent with the prime number theorem,

> for estimating the number of twin primes less than a given integer.