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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The largest number which can be written with all the digits from 1 to 5 (without repetition) as a sum of primes in 2 different ways: 541 + 23 = 564 and 523 + 41 = 564. [van Doorn] The largest prime factor of F_{11} (the largest completely factored Fermat number) has 564 digits.
(There is one curio for this number that has not yet been approved by an editor.)
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