Here’s a Javascript implementation, https://observablehq.com/@jrus/permuted-congruential-generator https://observablehq.com/@jrus/permuted-congruential-generat

Here’s a Javascript implementation, https://observablehq.com/@jrus/permuted-congruential-generator https://observablehq.com/@jrus/permuted-congruential-generat... It’s a bit of a pain because Javascript can’t do native 64-bit integer arithmetic. But it should still be fast enough for most purposes.