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

Just showing those entries submitted by 'Dobb': (Click here to show all)

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+ (2^31-1)/(2-1) and (2^31+1)/(2+1) are both prime numbers. [Dobb]

+ The prime number 31 is also a repunit in three different bases: 31 is 11111 in base 2; it is 111 in base 5, and it is 11 in base 30. [Dobb]

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