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Missouri researchers find world's largest prime number

By HEATHER HOLLINGSWORTH
Associated Press

   KANSAS CITY, Mo. (AP) -- University of Central Missouri mathematicians have found the largest prime number ever identified, but good luck remembering it.
   The researchers identified the 17 million-digit number last month as the 48th known Mersenne prime. A different computer system running on different hardware confirmed that it is a prime number. Primes are whole numbers such as 3, 7 and 11 that can only be divided without a remainder by themselves and 1.
   This is the third Mersenne prime identified at the university in Warrensburg, about 50 miles east of Kansas City.
   Mersenne primes are named after their discoverer, 17th century French mathematician Marin Mersenne. They're expressed as 2P-1, or two to the power of "P" minus one. P is itself a prime number. For the new prime, P is 57,885,161.

    Copyright 2013 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
Missouri researchers find world's largest prime number

Posted: Saturday, February 9 2013, 01:03 PM CST

IN OKLAHOMA NEWS

Motorists urged to avoid I-35 in Moore
May 23, 2013 13:43 GMT

MOORE, Okla. (AP) -- Oklahoma transportation officials say heavy traffic on Interstate 35 through Moore is hindering the tornado recovery effort.

The Transportation Department on Thursday asked motorists to avoid the area. The I-35 off-ramps in Moore are still restricted. The only people allowed to travel into Moore are residents and emergency responders.

Also, Oklahoma City police say Western Avenue between SW 164th and SW 134th is closed to all traffic. The closure will continue until utility crews finish installing new power lines.

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