Seed changes

Any normal minecraft world has a single, fixed seed, that determines its terrain, location of structures, etc. Purity followed this rule only to 31st August 2019, so for about 5 months.

### First seed leak

Cracking the world seed of any normal world is not really that difficult - using the locations of certain world's features, one can reverse-engineer the seed that it was created with. TipTopBop claims to do this months before the leak, probably shortly after the server was created. For unknown reasons, he decided to publicly leak it on 27th of August 2019. Penguin, in fact, did not like this, and that's what he wrote in Discord on the next day:

*I'm going to have to take the server offline at some point to force change the seed so that any bases built in new terrain will be unable to be located through coordinate exploits. Difficult to tell what exactly this will mean for existing terrain and bases on the current seed, but in my opinion any old map is already ruined in terms of vanilla gameplay anyway.*

In result of this, Tip was unfairly permabanned - unfairly, because no rule at that time stated that leaking the seed is bannable. Not long after that Tip was unbanned, when Staff realized that it wasn't fair (only to be banned again few months later for something completely unrelated).

Seed was changed on 31st August 2019. Not only that, the structure generation was separated from terrain seed, which was supposed to make the seed uncrackable in the future. Also, a rule was added that seek leaking is bannable from now on.

### Second seed leak

Apparently it wasn't "uncrackable", since the seed was cracked again, supposedly on 17th June 2020. Member of the Empire, EPIC\_THATS\_ME, used formation of end pillars on a temp map, which somehow let him crack the world seed. On 20th July 2020, Penguin found out about this and he was again very upset:

*Unfortunately, it's just been found out that there has been a second cracking of the server's terrain seed after it was changed previously. This should have been impossible due to the structure seed scrambling but there was a way around it during one of the temporary maps I was unaware of. This means as of **1500 EST** today, the terrain seed will be changed and the structure seeds will be re-scrambled. Additional measures will be put in place to prevent the seed from being cracked again using this method.*

EPIC was banned, world seed was changed again.

### Third Seed Leak

For about 2.5 years, Purity generated new terrain according to its 3rd seed, and many players were convinced that this time the seed is truly uncrackable. Sadly, it was not the case.

On January 21, 2023, a Discord account by the name of 'Mr. Brightside' leaked the third seed to multiple Purity-related Discord servers before being banned from them. By combing through the Purity Vanilla LiteBans database interface, players were able to quickly understand that an account of a very similar name, 'DrBrightside' had been first banned from Purity just four days earlier, on the 17th of January, first for Baritone, and rebanned permanently three hours later for evasion. At the time of writing, it's not known whose main, if anyone, DrBrightside is an alternate account of, but due to the fact that the seed was likely already known by many groups and players, it could be assumed that it was the alt of a long-banned player who finally decided to leave with a bang after his most recent alt was banned. If this is true, it's unlikely that the identity of this mysterious player nor the method used to crack the supposedly 'uncrackable' terrain seed will ever be made public. In the first hours following the event, Purity players quickly verified its authenticity by comparing the supposed terrain gen to known terrain in the overworld, as shown.

At the time of writing, Penguin has not made public any regulations for using the third seed for basehunting or mining, and as a result, the number included in this article (294256296██████████) has had its last ten digits obfuscated to restrict possibly nefarious usage from this article. Since the seed was available to the public for eight hours before being deleted from every primary DrBrightside message by moderators, it's likely that many people were initially able to copy the seed, and spread it to many more players.

Just 30 minutes after the leak, Staff shut down the server to prevent chaos. For a few days, Purity was running on a temp map. On 24th January, main map was restored with a new, 4th seed. Additionally, Penguin announced:

*To prevent existing bases from all being found and nuked thanks to chunk borders, elytra trails have been cleaned in the overworld.*

More precisely, all overworld chunks that were previously loaded for at most 15 seconds, were reset.

What was **not** announced is Staff gaining knowledge of the method used to crack the 3rd seed. There were also no mentions of any "additional measures" to prevent the seed cracking in the future. This might mean that they have no idea how it was done, and that the 4th seed is just as vulnerable as the 3rd.

### Using the first two seeds

You can use the first and the second seed without being banned. This might be helpful for a variety of things, such as finding buried treasure, strongholds (see Project Marco), diamond ore veins, rare biomes, etc. Keep in mind that they work only in old chunks, and you will have to find some way to tell in which seed you currently are (for example, Chunkbase).

1st seed: 2263149071503512601

2nd seed: 3248958374886244753

Both of these, along with many other useful stuff, can also be found in PV Tech Archive discord.