an 11,185,272-digit number which you can download here. The larger one was actually discovered first, on August 23, by Edson Smith, who had installed the prime-checking software on computers at UCLA. It is now the largest known prime, weighing in at a whopping 12,978,189 digits, and is equal to
You can download it here. Of course, as I suspected, these are both longer than ten million digits, which means that the first one to be discovered is eligible for a $100,000 prize!
These are ridiculously huge numbers. For a little perspective, the total number of atoms in the universe is estimated at somewhere around , a number with only eighty-one digits. Now go back and read again how many digits these newly discovered prime numbers have.