290 exhaustive: all 34 connected girth>=5 graphs with 2<=n<=7 PASS (exact)

graph                n    m     -l2min    m/meanG   290 marg |  #posD   n/meanG  295 marg
C5                   5    5     1.6180      8.333      6.715 |      1     8.333     7.333
C6                   6    6     1.0000     13.500     12.500 |      1    13.500    12.500
C7                   7    7     1.8019     20.045     18.244 |      1    20.045    19.045
Petersen            10   15     2.0000     25.000     23.000 |      1    16.667    15.667
Heawood             14   21     1.4142     57.909     56.495 |      7    38.606    31.606
Pappus              18   27     1.7321    108.000    106.268 |      5    72.000    67.000
Desargues           20   30     2.0000    141.527    139.527 |      1    94.351    93.351
MoebiusKantor       16   24     1.7321     80.842     79.110 |      4    53.895    49.895
Dodecahedral        20   30     2.2361    141.527    139.291 |      1    94.351    93.351
HoffmanSingleton    50  175     3.0000    312.500    309.500 |     22    89.286    67.286
P10path             10    9     1.6825     61.406     59.724 |      1    68.229    67.229
Star9               10    9    -0.0000     40.909     40.909 |      1    45.455    44.455
Spider333           10    9     1.4142     54.804     53.390 |      1    60.893    59.893

295 random-regular sweep (worst margins):

smallest 295 margin in sweep: n/a