ZarankiewiczDB,

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z(24,25) = 126

By Damásdi, Héger and Szőnyi's recursive bound with $\alpha=1$ and $\beta=6$. [DHS13, p. 17]

upper bound = 126, submitted on April 23rd, 2016 (link)

By deleting 7 rows and 6 columns from the finite projective plane of order 5.

lower bound = 126, submitted on April 23rd, 2016 (link)

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