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{
  "total_problems": 5426,
  "problems_by_difficulty": {
    "L5: Millennium Prize": 136,
    "L3: Advanced": 3838,
    "L4: Expert": 220,
    "L2: Intermediate": 316,
    "L1: Tractable": 916
  },
  "problems_by_category": {
    "Computer Science": 57,
    "Number Theory": 677,
    "Mathematical Physics": 50,
    "Partial Differential Equations": 35,
    "Algebraic Geometry": 26,
    "Combinatorics": 399,
    "Graph Theory": 727,
    "Topology": 1217,
    "Geometry": 605,
    "Algebra": 145,
    "Set Theory": 16,
    "Dynamical Systems": 421,
    "Group Theory": 299,
    "Analysis": 559,
    "Logic": 50,
    "Probability": 142,
    "Miscellaneous": 1
  },
  "problems_by_status": {
    "open": 5156,
    "solved": 9,
    "partially_solved": 261
  },
  "problems_by_set": {
    "millennium_prize": 6,
    "hilbert_problems": 11,
    "landau_problems": 1,
    "smale_problems": 8,
    "darpa_challenges": 17,
    "green_problems": 85,
    "erdos_problems": 632,
    "kourovka_new_problems_21": 150,
    "kirby_low_dimensional_topology": 366,
    "opengarden": 422,
    "amr_open_problem_lists": 3342
  }
}