I'm making a calculator in Scratch. There is any workaround or custom block that calculates logarithms of base 2?
Wikipedia article for those don't know or understands what is a binary logarithm

Does this help http://www.sosmath.com/algebra/logs/log4/log43/log43.html

It's in the link you gave!

(([ln v] of (x)) / ([ln v] of (2)))

Thanks!