The book is now available! 9788879
(just those submitted by Gaydos)
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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 'Gaydos': (Click here to show all)

+ There are four Sophie Germain prime palindromes with sums of reciprocals of digits that are less than one. They are 2, 3, 5, and 9788879. [Gaydos]

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