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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 12291*2^142857-1 is prime. Note that 12291 written in base-4 is palindromic (3000003). Also, if you sum the factorials of the digits of 12291*2^142857-1 you get the prime 1767235343. [Earls]

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