X-Nico

2 unusual facts about logarithm


LogMAR chart

The name LogMAR is derived from the Logarithm of the Minimum Angle of Resolution.

Yamaha YM3812

Scaling the output of an oscillator to a wanted volume would normally be done by multiplication, but the YM3812 avoids multiplications by operating on log-transformed signals, which reduces multiplications into computationally cheaper additions.


Alexander John Thompson

This table, the Logarithmetica britannica gives the logarithms of all numbers from 1 to 100000 to 20 places and supersedes all previous tables of similar scope, in particular the tables of Henry Briggs, Adriaan Vlacq and Gaspard de Prony.

Discrete logarithm records

On 18 Jun 2005, Antoine Joux and Reynald Lercier announced the computation of a discrete logarithm modulo a 130-digit (431-bit) strong prime in three weeks, using a 1.15 GHz 16-processor HP AlphaServer GS1280 computer and a number field sieve algorithm.

Jacques Ozanam

In 1670, he published trigonometric and logarithmic tables more accurate than the existing ones of Ulacq, Pitiscus, and Briggs.

Leonty Magnitsky

In 1703, Magnitsky also produced a Russian edition of Adriaan Vlacq's log tables called Таблицы логарифмов и синусов, тангенсов и секансов (Tables of Logarithms, Sines, Tangents, and Secants).

Logluv TIFF

In order to provide the required high dynamic range with imperceptible luminance steps, LogLuv uses 16 bits to encode a fixed-point base2-logarithm of the luminance, which allows an EV range of nearly 128 stops.

Magnitude of eclipse

This measure should not be confused with the astronomical magnitude logarithmic scale of brightness.


see also