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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) A term in a decreasing sequence of primes leading to the first prime number, involving the recursive use of the prime counting function: (5381) = 709, (709) = 127, ... , (3) = 2. This prime can be expressed as the sum of squares of five consecutive primes, starting with 23. [Patterson]
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