Add English dataset card

README.md

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+---
+pretty_name: Prime List from 1 to 1e14
+tags:
+- mathematics
+- prime-numbers
+- parquet
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: "1-1e14/*.parquet"
+---
+
+# Prime List from 1 to 1e14
+
+## Purpose
+
+This dataset publishes an ordered list of prime numbers in Parquet format for
+streaming, selective shard downloads, and online preview. It contains prime
+values only; it does not include labels, natural-language content, or derived
+features.
+
+## Coverage and shard contract
+
+- Coverage: `1 <= p < 100,000,000,000,000` (`1e14`)
+- Data directory: `1-1e14/`
+- Number of shards: 1,000
+- Integer interval width per shard: `100,000,000,000` (`1e11`)
+- File name pattern: `part-NNNN-of-1000.parquet`
+- Shard indices: `0000` through `0999`
+
+Shard `i` contains every prime in the half-open interval
+`[i * 1e11, (i + 1) * 1e11)`. The first shard therefore starts with `2`.
+Adjacent shard intervals do not overlap and do not leave gaps.
+
+Reading all 1,000 files in file-name order produces the complete globally
+sorted list. The dataset is complete when every shard from
+`part-0000-of-1000.parquet` through `part-0999-of-1000.parquet` is present.
+
+## Schema
+
+Each file is a directly readable Parquet file with the following schema:
+
+| Column | Arrow type | Nullable | Ordering |
+| --- | --- | --- | --- |
+| `prime` | `uint64` | No | Strictly increasing |
+
+Parquet data pages use ZSTD compression. A prime appears exactly once in the
+shard responsible for its numeric interval.
+
+## Usage
+
+Use streaming mode with Hugging Face Datasets to avoid downloading the entire
+collection at once:
+
+```python
+from datasets import load_dataset
+
+primes = load_dataset(
+    "lzray/primelist",
+    data_files="1-1e14/*.parquet",
+    split="train",
+    streaming=True,
+)
+
+for row in primes.take(10):
+    print(row["prime"])
+```
+
+For a limited numeric range, select only the files whose shard intervals
+intersect that range.
+
+## Scope limitations
+
+This repository provides prime enumeration data, not a primality-testing API
+or an interactive calculator. Consumers should preserve the `uint64` type;
+converting large values to a 32-bit integer will overflow.