Packing unit squares in a square $s(70)$
The side of the smallest square into which $70$ unit squares can be packed.
Lower bound:
Unknown
Upper bound:
${\approx}8.9121$
Updates
-
Upper bound: ${\approx}8.9121$
Reference unknown
[via Packing Unit Squares in Squares: A Survey and New Results, Erich Friedman, 2009-08-14]