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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) p = 5*6*9*1 + 1 is the largest prime factor of 5691, and 5691 = p*(5+6+9+1). Note that 5691 is the only odd number with this property and also there exists only one even number with this property. [Firoozbakht]
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