The book is now available! 65537
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ The largest known Fermat prime (224 + 1).

+ Just a small proportion of regular polygons (n-gons) can be constructed with compass and straightedge. Gauss proved that if n is a Fermat prime, then it is possible to construct an n-gon. Wantzel later proved this condition was also necessary (for prime n-gons), so the 65537-gon is currently the largest known constructible prime n-gon. It took Hermes 10 years and a 200-page manuscript to write down a procedure for its construction. Would you like to attempt it?

+ The smallest prime that is the sum of a nonzero square and a nonzero cube in four different ways: 65537 = 1222 + 373 = 2192 + 263 = 2552 + 83 = 2562 + 13. [Post]

+ To remember the digits of 65537, recite the following mnemonic: "Fermat prime, maybe the largest." Then count the number of letters in each word. [Brent]

+ Largest known prime mean of a Fermat prime and a Mersenne prime 65537 = (3+131071)/2. Richard Mathar has searched through all means that can be created from the existing values of the two OEIS sequences, Mersenne primes and Fermat primes. [Post]

+ The largest non-titanic prime of form n^(2*n) + 1, (case n = 4). [Loungrides]

+ The smallest octavan prime (form x^8 + y^8), where x and y are distinct non-prime digits, i.e., 1^8 + 4^8 = 65537. [Loungrides]

+ The largest known prime with a Hamming Weight of 2. In other words, the binary representation of 65537 has only 2 ones, which makes computer operations much easier. This fact is extremely important to cryptographers, who use 65537 as a common encryption exponent. [Price]

(There are 2 curios for this number that have not yet been approved by an editor.)

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