Use the form below to do your conversion.
Solution
Step1
Log153991=Log(3991) ÷ Log(15)
Log(3991)= 3.601081727784
Log(15)=1.1760912590557
Log153991=3.601081727784 ÷ 1.1760912590557
Ans=3.0619067185955
Step2
Alternatively, the logarithm can be calculated like this.