When log is written without a base, is the equation normally referring to log base 10 or natural log? For example, this question presents the equation
$$\omega(n) < \frac{\log n}{\log \log n} + 1.4573 \frac{\log n}{(\log \log n)^{2}},$$
but I'm not entirely sure if this is referring to log base $10$ or the natural logarithm. 

In many programming languages, log is the natural logarithm. There are often variants for log2 and log10.
Checked in C, C++, Java, JavaScript, R, Python
