The book is now available! 89
(just those submitted by Astle)
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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 'Astle': (Click here to show all)

Photo credit: Marsha Greer
+ The smallest prime for which the sum of all odd primes less than or equal to it is a square. [Astle]

+ 89 is the smallest prime that is changed into a composite number if any digit is deleted. [Astle]




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