@algorithm.ts/prime

A typescript implementation of the Linear Sieve algorithm for prime numbers.

If you are curious about this algorithm, you can visit [here][prime] for more details.

Install

• npm

  npm install --save @algorithm.ts/prime

• yarn

  yarn add @algorithm.ts/prime

Usage

• Get all prime numbers in the range $[2, N)$:

  import { sievePrime } from '@algorithm.ts/prime'
  
  sievePrime(5)   // => [2, 3]
  sievePrime(6)   // => [2, 3, 5]
  sievePrime(10)   // => [2, 3, 5, 7]

• Get all prime numbers and totient function values in the range $[2, N)$:

  import { sieveTotient } from '@algorithm.ts/prime'
  
  const [totients, primes] = sieveTotient(10)
  // =>
  //    totients: [0, 1, 1, 2, 2, 4, 2, 6, 4, 6]
  //    primes: [2, 3, 5, 7]

Related

• Euler's totient function | Wikipedia
• 数论基础之筛法
• 数论基础之筛法 | 光和尘