This is the 2000 digit prime number discovered recently by Dr John Cosgrave, a maths lecturer and head of mathematics at a Dublin College:
This is not the largest prime ever discovered but it is definitely the first found to be exactly 2000 digits  a significant figure for the millennium.
Having used his computer to search for prime numbers (to use in a course he teaches on cryptography and number theory) he compiled a list of over 300 numbers which he then checked for primes. He was actually on the lookout for a prime with at least a thousand digits  a "titanic" prime  and when he got to number 325 in the list chanced upon the millennium prime.
It is not the largest prime ever found (that has over 2 million digits in it) and it will not be the last  Euclid proved in the third century BC that there are an infinite number of primes.
To go to Dr John Cosgrove's home page http://www.spd.dcu.ie/johnbcos
Source: The Guardian Newspaper
