Prime Factors where X goes from y=0 to 1

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http://www.constructorscorner.net/Files/20201024RSA290.pdf

 

This is the last of my attempts. If you graph the function simply: x (the small prime factor) occurs where the graph goes from zero to 1 (y-value).

 

I think that this eliminates the value of x to a manageable amount of test values.

 

Is this useful? And does a graph of a function faster than trial and error division?

Edited November 30, 2020 by Phi for All
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The title should read from y = 0 to 1.

 

I am looking for a graphing software that will draw graphs in real time. Such features as panning, zooming, and redrawing. I used Mathematica put I get "snapshots" of the graph. I want a graph that redraws and acts like a CAD software. I not sure that it exists, but I am putting it on my wishlist.

As you can see by the picture of the graphs, examination of the graph is a challenge. But I hypothesis that x is the last value of the graph where y goes from 0 to 1.