primeval

primeval

A tiny (77B) utility to check if a value is a prime number

Makes use of a very neat trick which proves that squaring any prime number, excluding the "sub primes", is always 1 more than a multiple of 24 🤯 — watch the video!

All credit goes to Matt Parker and Numberphile

This module exposes three module definitions:

• ES Module: dist/primeval.mjs
• CommonJS: dist/primeval.js
• UMD: dist/primeval.min.js

Install

$ npm install --save primeval

Usage

import primeval from 'primeval';

primeval(2);   //=> true
primeval(3);   //=> true
primeval(17);  //=> true
primeval(29);  //=> true
primeval(25);  //=> false
primeval(512); //=> false
primeval(12);  //=> false
primeval(1);   //=> false

primeval("foobar");   //=> false
primeval(100.1231);   //=> false
primeval(null);       //=> false

API

primeval(num)

Returns: Boolean

num

Type: Number

The number that you want to check.

Note: Any non-Number type will always return a false output.

License

MIT © Luke Edwards