ZarankiewiczDB,

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z(7,19) = 39

111111
111111
11111
11111
11111
111111
111111

Found by the scaffold algorithm.

(0.03734497 seconds, score = 39, 23 recursive calls, max depth = 19)

lower bound = 39, submitted by Andrew Kay on April 22nd, 2016 (link, raw)

By Roman's bound with $p = 2$. [Rom75]

upper bound = 39, submitted on April 22nd, 2016 (link)

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