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prng_tychei

Tyche-i, by Samuel Neves and Filipe Araujo, is a bit-shifting random number generator derived from ChaCha, a modern stream cipher.

  • Period: ~2^127
  • Reported to pass: No systematic BigCrush failures reported.
import {prng_tychei} from 'esm-seedrandom'
import {prng_tychei} from 'esm-seedrandom/esm/tychei.js'
import prng_tychei from 'esm-seedrandom/esm/tychei.js'

// from a browser or deno environment
import {prng_tychei} from '//cdn.jsdelivr.net/npm/esm-seedrandom/esm/index.min.js'
import {prng_tychei} from '//cdn.jsdelivr.net/npm/esm-seedrandom/esm/tychei.min.js'


let myrng = prng_tychei('an example seed string', {state: true})

console.log(myrng()); // between 0.0 and 1.0 as f32
console.log(myrng.quick()); // between 0.0 and 1.0 as f32
console.log(myrng.double()); // between 0.0 and 1.0 as f64
console.log(myrng.int32()); // between -2147483648 and 2147483647


let mystate = myrng.state()
console.log(mystate); // a JSON-serializable object capturing the internal PRNG state

let dup_myrng = prng_tychei(null, {state: mystate})