Definition:Brun's Constant/Mistake

Source Work

 * The Dictionary
 * $1 \cdotp 90216 \, 054 \ldots$
 * $1 \cdotp 90216 \, 054 \ldots$

Mistake

 * Brun's constant ... Its value is exceedingly hard to calculate. The best estimate is $1 \cdotp 90195 \pm 10^{-5}$.

While this statement was correct at the time of the first $1986$ edition of, by the time of the second edition, the number had been refined considerably, to $1 \cdotp 90216 \, 054 \ldots$.

Interestingly, had updated the title of the section, but not the detail inside it.