random.directory

How the RandomX algorithm works

The virtual machine and its random programs, the 2080 MiB dataset, RandomX v2, and the variants other coins have made by changing its parameters.

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Guide

What is RandomX? The CPU proof of work, explained

RandomX is the proof of work Monero has run since 30 November 2019: random programs executed in a virtual machine over a 2080 MiB dataset, built so that an ordinary CPU stays the efficient way to mine. How one hash is made, and why it needs that much memory.

A flat illustration of two blocks of small square cells standing side by side, one indigo and one orange

Guide

RandomX v2: what changes and when Monero switches

RandomX v2, released in March 2026, makes each hash about 53% more work — longer programs, AES in the main loop, a rarer rounding change and a deeper prefetch — for a small loss of hashrate. Monero has not switched yet: the change waits for a hard fork with no date set.

A flat illustration of a bunch of keys of different shapes on rings, in indigo and orange, one fob cut with square cells

Guide

RandomX variants: rx/0, rx/2, rx/wow, rx/arq and more

RandomX is a family: Monero's rx/0 and the coming rx/2, and variants for Wownero, ArQmA, Graft, Safex and YadaCoin, each with its own salt and some with smaller scratchpads or shorter loops. What each RandomX variant changes, read from XMRig's source.