1. flips and rules fired per random addition (random firing order)
   4 digits phi        8 values  detected 0.375  correctable 0.062  rules fired mean 1.22 max 5
   4 digits binary    16 values  detected 0.000  correctable 0.000  rules fired mean 1.55 max 4
   6 digits phi       21 values  detected 0.397  correctable 0.079  rules fired mean 2.03 max 7
   6 digits binary    64 values  detected 0.000  correctable 0.000  rules fired mean 2.49 max 6
   8 digits phi       55 values  detected 0.409  correctable 0.086  rules fired mean 2.83 max 11
   8 digits binary   256 values  detected 0.000  correctable 0.000  rules fired mean 3.52 max 8
  10 digits phi      144 values  detected 0.417  correctable 0.090  rules fired mean 3.66 max 15
  10 digits binary  1024 values  detected 0.000  correctable 0.000  rules fired mean 4.49 max 10
  13 digits phi      610 values  detected 0.424  correctable 0.094  rules fired mean 4.97 max 16
  13 digits binary  8192 values  detected 0.000  correctable 0.000  rules fired mean 5.92 max 13

2. rules fired per sum, same values in both registers (lowest position first)
  values < 21   phi    mean 2.20 max 9
  values < 21   binary mean 1.33 max 5
  values < 55   phi    mean 3.18 max 16
  values < 55   binary mean 2.13 max 6
  values < 144  phi    mean 4.17 max 25
  values < 144  binary mean 2.80 max 8

3. parallel settling rounds per sum
  values < 21   phi    width  6  mean 1.82 worst 6
  values < 21   binary width  5  mean 1.20 worst 5
  values < 55   phi    width  8  mean 2.32 worst 7
  values < 55   binary width  6  mean 1.72 worst 6
  values < 144  phi    width 10  mean 2.73 worst 8
  values < 144  binary width  8  mean 2.08 worst 8
  values < 610  phi    width 13  mean 3.20 worst 11
  values < 610  binary width 10  mean 2.51 worst 10

4. lockstep: expected rounds when lanes wait for the slowest (values < 144)
  phi     1 lanes  2.75
  phi    32 lanes  5.86
  binary  1 lanes  2.09
  binary 32 lanes  5.71