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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The Mathematics Department at the University of Illinois had their postage meter changed to stamp "2^{11213}  1 IS PRIME" after a recordbreaking Mersenne prime was found there in 1963. The smallest prime formed by inserting the same digit in between three successive numbers. [Loungrides] The smallest prime p formed by inserting a prime digit between the first doubledigit twin prime pair. Curiously, sod(p) is a perfect cube. [Bajpai]
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