Working storage for a from-scratch English language-model pretraining corpus. Each region is one contiguous slice of the source work plan, tokenized and filtered, produced by one parallel worker. This repository is the producer output, not the training set: the regions still have to be merged in work-plan order (global exact-duplicate removal and the token budget are applied there). Derived from nvidia/Nemotron-ClimbMix, revision 5eaa64b9c0c85b7f56af01d7dffdb0795816b12b, which is licensed CC-BY-NC-4.0. This derived dataset inherits that licence: non-commercial use only, attribution to NVIDIA required. No text was rewritten or generated; documents are the source documents, filtered and…