Choose exampe:

Input: =

,

{{ speedup }}X

Sequence output for primes :

List of erros:

- {{ e }}

Source Code: https://github.com/tjwei/Fractran

From wikipedia Fractran:

FRACTRAN is a Turing-complete esoteric programming language invented by the mathematician John Conway. A FRACTRAN program is an ordered list of positive fractions together with an initial positive integer input n. The program is run by updating the integer n as follows: for the first fraction f in the list for which nf is an integer, replace n by nf repeat this rule until no fraction in the list produces an integer when multiplied by n, then halt.