Brun’s constant

Brun’s constant is the sum of the reciprocals of all twin primes

B=pp+2 is prime(1p+1p+2)1.9216058.

Viggo Brun proved that the constant exists by using a new sieving method, which later became known as Brun’s sieve (

Title Brun’s constant
Canonical name BrunsConstant
Date of creation 2013-03-22 13:20:01
Last modified on 2013-03-22 13:20:01
Owner bbukh (348)
Last modified by bbukh (348)
Numerical id 8
Author bbukh (348)
Entry type Definition
Classification msc 11N36
Classification msc 11N05
Related topic BrunsPureSieve