Examples:
$${{log}}_{{\mathtt{2}}}{\left({\mathtt{64}}\right)} = {\mathtt{6}}$$ because 26 = 64
$${{log}}_{{\mathtt{2}}}{\left({\mathtt{10}}\right)} = {\mathtt{3.321\: \!928\: \!094\: \!887\: \!362\: \!6}}$$ because 23.321928... = 10
On the scientific calculator on the Home page here, if you hover the cursor over the log key, the lg2 key will appear. In the Math(Input=Result) window type log(x,2) to get the log to the base 2 of x.
Examples:
$${{log}}_{{\mathtt{2}}}{\left({\mathtt{64}}\right)} = {\mathtt{6}}$$ because 26 = 64
$${{log}}_{{\mathtt{2}}}{\left({\mathtt{10}}\right)} = {\mathtt{3.321\: \!928\: \!094\: \!887\: \!362\: \!6}}$$ because 23.321928... = 10
On the scientific calculator on the Home page here, if you hover the cursor over the log key, the lg2 key will appear. In the Math(Input=Result) window type log(x,2) to get the log to the base 2 of x.