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Great Internet Mersenne Prime Search New Prime!?
Take a look at:
http://www.mersenneforum.org/showthread.php?t=20830
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Those people do a great job finding an enormous new prime, and then they fail to notice their result! In 2009 with 2^42643801 - 1, and now again with this new one. How hard can it be?
Has PrimeGrid ever overlooked some great finds in a similar fashion?
/JeppeSN |
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 Michael Goetz Volunteer moderator
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Those people do a great job finding an enormous new prime, and then they fail to notice their result! In 2009 with 2^42643801 - 1, and now again with this new one. How hard can it be?
Has PrimeGrid ever overlooked some great finds in a similar fashion?
/JeppeSN
Prime, no. But a Fermat divisor did fall through the cracks once and it was a few months before we noticed the mistake.
Of course, we find a LOT of primes, so we have all sorts of tools that automate the various tasks. If it was something that only happened every couple of years, it would be a lot easier to not notice. That's why you build the sirens and the flashing lights. If the automatic alarms malfunction, it's easy to understand how it could go unnoticed. I believe that's what happened with this Mersenne prime.
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My lucky number is 75898524288+1 |
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Heads up:
sometime next week, one of the two things will need to be tweaked on the main web page -
▪ either the red ">1<" will have to be changed to "2",
▪ or b should be significantly upped (with the skipped b values set aside for another time or another queue). |
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Michael GoetzVolunteer moderator
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Joined: 21 Jan 10
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Heads up:
sometime next week, one of the two things will need to be tweaked on the main web page -
▪ either the red ">1<" will have to be changed to "2",
▪ or b should be significantly upped (with the skipped b values set aside for another time or another queue).
The first one will be automatic, if appropriate. The numbers are derived in real time (almost) from the T5K list.
As for the second part, that can wait until we know what the details are.
It sounds like you're saying that you know what the number is and that it's in excess of 20 million digits. That's something to celebrate, for sure.
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My lucky number is 75898524288+1 |
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I think the second thing will be the way to go. Neither the speed nor the chances will change (not significantly anyway). The goal of WR is (and always has been, in my opinion) a respectable one.
In fact, I'd encourage to re-review and implement the Cyclo N=22 sieving and an exactly equivalent queue, in parallel. The runtimes will be the same as for an equally sized GFN; the chances of a Cyclo WR are in fact just a bit higher per unit of time! (Because they have less allowable prime factors while sieving and can be sieved higher using the same time.) |
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Also remember what I once said in a post elsewhere (talking about the GFN search here at PrimeGrid):
It is not unlikely that GIMPS's next find will be so big that people here at PrimeGrid will demand n=23 opened...
/JeppeSN
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The new world record prime ist now official:
http://www.mersenne.org/primes/?press=M74207281
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My lucky number: 65531*2^3629342-1 (TRP) |
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I started a thread New 2016 world-record prime in the Generalized Fermat Prime Search forum on the new b value(s) needed to set a world record by GFN. /JeppeSN |
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Provisionally M49. Same dude also found Provisional M48 a couple years ago.
AND found M43 a month ago. (and M44 in 2006)
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My Lucky Number is 1893*2^1283297+1 |
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axnVolunteer developer
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Provisionally M49. Same dude also found Provisional M48 a couple years ago.
AND found M43 a month ago. (and M44 in 2006)
M43 was found a month and a decade ago ;-) |
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right. keep forgetting which decade we are in.
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My Lucky Number is 1893*2^1283297+1 |
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