If you are interested in Large Powers of 13, you can click one of these...

13^(13^1) 13^(13^2) 13^(13^3) 13^(13^4) 13^(13^5) 13^(13^6) 13^(13^7)
Source Code Timings


If you are curious about what the Square Root of 13 is, you can click one of these...

SQRT(13) Source Code Timings