It was confirmed on January 7th of 2018.

The number is

#### 2^{74,207,281} - 1

2^{74,207,281} is not a prime number.

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

The last digit of 2^{74,207,281} is 2.

The new prime number is 2^{74,207,281}- 1.

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