cleanup_report.json

{
  "initial": 8785,
  "clean": 8626,
  "dup_ids": 0,
  "dup_titles": 153,
  "empty_statements": 6,
  "unpublished_removed": 0,
  "by_status": {
    "open": 4354,
    "partially_solved": 3580,
    "solved": 692
  },
  "by_difficulty": {
    "L3: Advanced": 6143,
    "L4: Expert": 937,
    "L1: Tractable": 908,
    "L2: Intermediate": 516,
    "L5: Millennium Prize": 122
  }
}