Use the form below to do your conversion.
Solution
Step1
Log138591=Log(8591) ÷ Log(13)
Log(8591)= 3.9340437190355
Log(13)=1.1139433523068
Log138591=3.9340437190355 ÷ 1.1139433523068
Ans=3.5316371437458
Step2
Alternatively, the logarithm can be calculated like this.