**It was confirmed on December 21st, 2018. **

**The number is**

#### 2^{82,589,933} - 1

2^{82,589,933} is not a prime number.

It is an even number because all the 2’s are multiplied together.

The last digit of 2^{82,589,933} is 2.

The new prime number is 2^{82,589,933}- 1.

So the last digit of the new largest prime number is 2-1 = 1