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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) Relocating a single digit converts it into a concatenation of five primes: 234156789 _ 23 : 41 : 5 : 67 : 89. [Trigg] (123456789)_{111} x 10^{2285} + 1 is prime. Note 123456789 is repeated 111 times. [Dubner] Replacing each of the digits, onebyone with a 0, yields primes in three cases: 1, 2, and 7 (023456789, 103456789, and 123456089). Note that 127 is a Mersenne prime. [Trotter]
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