[ExI] New prime number found

spike spike66 at att.net
Wed Jan 20 18:37:29 UTC 2016



From: extropy-chat [mailto:extropy-chat-bounces at lists.extropy.org] On Behalf Of John Clark
Sent: Wednesday, January 20, 2016 9:53 AM
To: ExI chat list <extropy-chat at lists.extropy.org>
Subject: [ExI] New prime number found


>…The largest known prime number has just been found, 2^74207281 -1 is prime; it starts off as 300376 carries on for a bit and then concludes with 436351. I omitted the middle bit because the entire number is 22,338,618 digits long…




 >… John K Clark


John, you could have given us the entire number expressed in binary.  But I suppose 8 thousand pages of nothing but 1s would be boring.  I would counter-propose expressing it in hex, so it would be a couple hundred pages of Fs.


Cool thanks for the heads up.  I heard when it was discovered but with a number that size it really is important to wait for a verification.  The discovery came on the 20th anniversary of GIMPS, the Great Internet Mersenne Prime Search.






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