I’ve now set up a slow composer + guesser on testnet. So anyone wanting to use testnet can do so. If you have a half-decent modern machine you can mine faster than me and get all the (worthless) testnet coins.
I’m composing + guessing on a AMD Ryzen 9 9900X3D 12-Core Processor machine with 128GB RAM.
I’m not running a proof upgrader on the testnet network, so you have to publish your own SingleProof-backed transactions to have your transactions mined. ProofCollection-backed transaction will very likely not be mined.
A testnet block explorer can be found on http://51.158.203.7/
A publicly available testnet peer can be connected to on 51.15.139.238:19798.