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z(26,27) = 142

Searching for matrices of weight greater than 142, all but one scaffold was eliminated without search.

Scaffold: $p=5$, $q=5$, $\mathbf{m} = (4,4,4,4,4)$, $\mathbf{n} = (5,4,4,4,4)$, $m_O = 0$, $n_O = 0$.

(1503.072408529 seconds, score = 0, 16870567 recursive calls, max depth = 21)

upper bound = 142, submitted by Andrew Kay on July 26th, 2016 (link)

By deleting 4 rows and 5 columns from the finite projective plane of order 5.

lower bound = 142, submitted on July 26th, 2016 (link)

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