Use the form below to do your conversion.
Solution
Step1
Log256439=Log(6439) ÷ Log(25)
Log(6439)= 3.8088184250921
Log(25)=1.397940008672
Log256439=3.8088184250921 ÷ 1.397940008672
Ans=2.7245936173687
Step2
Alternatively, the logarithm can be calculated like this.