According to Wikipedia, the biggest known prime number (as of December 2020) is 2^82,589,933 − 1, which has 24,862,048 digits when printed in base 10.

The number itself is unfathomable.

Let’s write a java program that calculates this number and writes it in a text file.

It doesn’t take much time to calculate the number, but writing on file or flushing on Standard output would take quite a significant time.

The file is quite large: 24.9 MB. Any text editor would struggle to open it.

Here is a glimpse of the number:

If you want to see this on yourself then this file: theLargestKnownPrime

for **copy/paste** pleasure: https://github.com/rokon12/100DaysOfJava/blob/main/src/main/java/com/bazlur/Day013.java