refactor: Inherit PrimeFactorizationDataset from ProceduralDataset base class

reasoning_gym/arithmetic/prime_factorization.py

@@ -2,6 +2,7 @@
 from dataclasses import dataclass
 from random import Random
 from typing import List, Optional, Tuple
+from ..dataset import ProceduralDataset
 
 @dataclass
 class PrimeFactorizationConfig:
@@ -17,27 +18,13 @@ class PrimeFactorizationConfig:
         assert self.max_value >= self.min_value, "max_value must be >= min_value"
 
 
-class PrimeFactorizationDataset:
+class PrimeFactorizationDataset(ProceduralDataset):
     """Generates prime factorization tasks"""
 
     def __init__(self, config: PrimeFactorizationConfig):
         self.config = config
         self.config.validate()
-        self.seed = config.seed if config.seed is not None else Random().randint(0, 2**32)
-
-    def __len__(self) -> int:
-        return self.config.size
-
-    def __iter__(self):
-        self._current_idx = 0
-        return self
-
-    def __next__(self):
-        if self._current_idx >= self.config.size:
-            raise StopIteration
-        item = self[self._current_idx]
-        self._current_idx += 1
-        return item
+        super().__init__(seed=config.seed, size=config.size)
 
     def _prime_factors(self, n: int) -> List[int]:
         """Compute prime factors of a number"""