Why stop there. Create an algorithm that distributes the calculation of each unique number to a different instance. Surely that would scale even better!

I wouldn’t be surprised if there isn’t at least one thing this insane at some FAANG.

“We’ve got to scale the maths engine cluster to handle the load!”

I mean, there's this

https://www.npmjs.com/package/is-even

The actual implementation of this package is even better.

https://github.com/i-voted-for-trump/is-even/blob/master/ind...

What is even better is the fact that it has 200k weekly downloads. I thought this was supposed to be a troll package.

It is a troll package. Just a successful one.

Don't fall for the salesman's "it was a joke" play.

Is-thirteen, now THAT is a troll package.

But why do people use this? Is this a dependency in some popular library?

Well worth a quick trip to the source to see how it's implemented. After all, how would the author get around to packaging 4B if statements, like the OP?

He could package it to the size limit and range the numbers it could detect. Add a note to download particular package if the number is out of range of the package and that package is not installed.

One package should probably handle range of one million. Now it's just 4000 packages to install. You wouldn't even notice that in an average js project.