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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The smallest invertible prime p that is the sum of two successive pentagonal numbers: {844372751, 844443930}. Interestingly, p can also be expressed as the sum of two squares, i.e., (29741^2 + 28360^2). [Jha]
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