551.97504 = sum of:
  1.9750261 = max of:
    1.9750261 = weight(allfields:concurr in 270) [SchemaSimilarity], result of:
      1.9750261 = score(freq=1.0), computed as boost * idf * tf from:
        6.256005 = idf, computed as log(1 + (N - n + 0.5) / (n + 0.5)) from:
          628 = n, number of documents containing term
          327531 = N, total number of documents with field
        0.31570083 = tf, computed as freq / (freq + k1 * (1 - b + b * dl / avgdl)) from:
          1.0 = freq, occurrences of term within document
          1.2 = k1, term saturation parameter
          0.75 = b, length normalization parameter
          168.0 = dl, length of field (approximate)
          80.96143 = avgdl, average length of field
  550.0 = max of:
    10.0 = allfields_unstemmed:program*^10.0
    500.0 = topic:program*^500.0
    550.0 = topic_unstemmed:program*^550.0
    1.0 = allfields:program*