You have probably been taught that two is the only even prime number. But today mathematicians at the University of Southern North Dakota at Hoople have discovered a new, large, even prime. It is more than a million digits long and is equal to the value of 3²²³⁷⁵⁶¹+3¹¹¹⁸⁷⁸¹.
via Pocket http://ift.tt/1koPXNE
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