Barban's Constant

Barban's constant is defined as


(OEIS A175640), where the product is over the primes p.

See also

Artin's Constant, Feller-Tornier Constant, Heath-Brown-Moroz Constant, Murata's Constant, Prime Products, Quadratic Class Number Constant, Sarnak's Constant, Taniguchi's Constant, Twin Primes Constant

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Barban, M. B. "The Large Sieve Method and Its Application to Number Theory." Uspehi Mat. Nauk 21, 51-102, 1966.Finch, S. "Class Number Theory." May 6, 2005.Sloane, N. J. A. Sequence A175640 in "The On-Line Encyclopedia of Integer Sequences."

Cite this as:

Weisstein, Eric W. "Barban's Constant." From MathWorld--A Wolfram Web Resource.

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