ZarankiewiczDB,

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z(24,28) = 136

Given by the density principle on z(23,28).

upper bound = 136, submitted on April 25th, 2016 (link)

By deleting 7 rows and 3 columns from the finite projective plane of order 5.

lower bound = 136, submitted on April 24th, 2016 (link)

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