Editing Benford's law (section)

===Distributions known to obey Benford's law===
Some well-known infinite [[integer sequence]]s {{not a typo|provably}} satisfy Benford's law exactly (in the [[asymptotic limit]] as more and more terms of the sequence are included). Among these are the [[Fibonacci number]]s,<ref>{{cite journal | last1 = Washington | first1 = L. C. | year = 1981 | title = Benford's Law for Fibonacci and Lucas Numbers | journal = [[The Fibonacci Quarterly]] | volume = 19 | issue = 2| pages = 175–177| doi = 10.1080/00150517.1981.12430109 }}</ref><ref>{{cite journal | last1 = Duncan | first1 = R. L. | year = 1967 | title = An Application of Uniform Distribution to the Fibonacci Numbers | journal = [[The Fibonacci Quarterly]] | volume = 5 | issue = 2 | pages = 137–140| doi = 10.1080/00150517.1967.12431312 }}</ref> the [[factorial]]s,<ref>{{cite journal | last1 = Sarkar | first1 = P. B. | year = 1973 | title = An Observation on the Significant Digits of Binomial Coefficients and Factorials | journal = Sankhya B | volume = 35 | pages = 363–364}}</ref> the powers of&nbsp;2,<ref name=powers>In general, the sequence ''k''<sup>1</sup>, ''k''<sup>2</sup>, ''k''<sup>3</sup>, etc., satisfies Benford's law exactly, under the condition that log<sub>10</sub> ''k'' is an [[irrational number]]. This is a straightforward consequence of the [[equidistribution theorem]].</ref><ref name=":0">That the first 100 powers of&nbsp;2 approximately satisfy Benford's law is mentioned by Ralph Raimi. {{cite journal | last1 = Raimi | first1 = Ralph A. | year = 1976 | title = The First Digit Problem | journal = [[American Mathematical Monthly]] | volume = 83 | issue = 7| pages = 521–538 | doi=10.2307/2319349| jstor = 2319349}}</ref> and the powers of almost any other number.<ref name=powers />

Likewise, some continuous processes satisfy Benford's law exactly (in the asymptotic limit as the process continues through time). One is an [[exponential growth]] or [[exponential decay|decay]] process: If a quantity is exponentially increasing or decreasing in time, then the percentage of time that it has each first digit satisfies Benford's law asymptotically (i.e. increasing accuracy as the process continues through time).