To provide a heptadecial number system using three primary colors of light color since processing speed of a present digital operation of a binary number system of "1", "0" using square wave basically depends on a frequency of a CPU and since the processing speed is becoming a saturated state.

In order to attain the heptadecimal number system on the basis of the three primary colors of light color, a plurality of two or more kinds of light colors and a light color of a single color are mixed by the following method. The processing speed is raised by 3.5 times as high as the binary number system by taking the heptadecimal number method using the three primary colors of light color. In addition, the present digital operation is basically determined by height of the frequency, however, the light colors can attain processing speed close to the light speed (300×106 m/second).