Richard Paul Pavlick is arrested for attempting to blow up and assassinate the 35th U.S. President, John F. Kennedy only four days earlier.,
The 43rd known Mersenne prime is discovered by Dr. Curtis Cooper & Dr. Steven Boone of United States, participants of the Great Internet Mersenne Prime Searchdistributed computing project. The prime number is 2nd largest known prime and has more than nine milliondigits.,