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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) When you remove the penultimate (next to the last) digit of 123457 you will end up with yet another prime. Repeat the process for four more primes. [Brod] The smallest prime formed from the first six imperfect numbers in order. [Beedassy] The sum of the repunit number 111111 and all truncations of itself plus one is prime. [Loungrides]
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