The book is now available! 89
(just those submitted by Astle)
Prime Curios!
Curios: Curios Search:

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]

Prime Curios! © 2000-2020 (all rights reserved)  privacy statement