First release

• Datasets for Balanced Multiway Number Partitioning (BMNP) at scale.
• All solutions achieve the theoretical optimum.
• Large-scale verified optimal partitions.
• SOTA snapshot + independent validation script provided.
• Repository: https://github.com/mllmso/Optimal_Balanced_Multiway_Number_Partitioning
• License: CC-BY-4.0