A visual representation of a large prime number. - - - - - Used in cryptography and digital security, primes make much of our modern lives possible - If you're reading this, you're making use of prime numbers. Thank you primes. You weirdly unpredictable beasts. - - - - - Some years ago I had some free CPU cycles, decided to contribute some time to the PrimeGrid project and, over the course of a few months, I discovered/proved a few new prime numbers. - - - - - This piece contains the full decimal representation of the large prime you see in the title, inserted into the data stream of a PNG file and manipulated to form a valid image file.