(M48) NEW MERSENNE PRIME! LARGEST PRIME NUMBER DISCOVERED! - Page 12

ATH · 2013-01-28, 14:51

Hmm, I found several exponents like the one dabaichi posted: http://mersenneforum.org/showpost.ph...9&postcount=95

without any "Unverified" line or "Assigned" line and nothing under http://www.mersenne.org/assignments, so they look like they are available for LL test, but the summary http://www.mersenne.org/primenet/ shows no available LL in the range in question.

So is the summary bugged? or did these exponents "fall through the cracks" somehow?

akruppa · 2013-01-28, 15:09

Quote:

Originally Posted by Mini-Geek

A bit of history will explain it: GIMPS once "found" a Mersenne prime, and immediately reported the number. The news spread before the double-checks were complete. The result of the double-checks? Composite.

To avoid such false information from spreading in the future, the identity of the number is kept secret until double-checks confirm the new prime.

They did not actually report the number, and specifically because the verification runs had not finished. Lots of news outlets jumped the gun, however, and reported that new Mersenne prime had been found (without telling what the exponent is, iirc). When the verification revealed a composite, they all had to back-pedal, which was bad enough publicity for GIMPS, even tho they hadn't officially announced a new prime. It would have been pretty embarassing if they had; all the more reason not to reveal the exponent until verification is finished.

Dubslow · 2013-01-28, 16:09

Quote:

Originally Posted by ATH

Hmm, I found several exponents like the one dabaichi posted: http://mersenneforum.org/showpost.ph...9&postcount=95

without any "Unverified" line or "Assigned" line and nothing under http://www.mersenne.org/assignments, so they look like they are available for LL test, but the summary http://www.mersenne.org/primenet/ shows no available LL in the range in question.

So is the summary bugged? or did these exponents "fall through the cracks" somehow?

I ran into this issue with my last dozen candidates: none of them were reservable for LL or TF. In order to get just one out of the dozen, I had to cheat a little

I'd be willing to bet that George did this on purpose to stop people like us.

chalsall · 2013-01-28, 16:46

Just in case anyone hasn't actually read the Prime95/mprime EULA which they agreed to by running the program....

butera · 2013-01-28, 17:17

I'm glad to see a new prime after I rejoined the search a few months ago and started checking the forums regularly!

LaurV · 2013-01-28, 17:58

What a pity we found a new mersenne prime... Now Xyzzy and his minions will have a lot of things to do, for example remove all the references of the old record from the front page of the forum:

"Most users ever online: 2^43,112,609-1 on 23 Aug 08",

This and many things will have to be changed...

ATH · 2013-01-28, 18:49

Quote:

Originally Posted by butera

I'm glad to see a new prime after I rejoined the search a few months ago and started checking the forums regularly!

Yeah, consider yourself lucky. It's 45 months since the last one.

Prime95 · 2013-01-28, 19:43

Quote:

Originally Posted by Mini-Geek

A bit of history will explain it: GIMPS once "found" a Mersenne prime, and immediately reported the number. The news spread before the double-checks were complete. The result of the double-checks? Composite.

I don't remember that. Which new outlets / exponent was it?

I think I remember being slash-dotted prematurely with links to the forum thread where the ongoing verification was being run. I don't remember if that happened during a false positive.

I do remember the excitement during our first false positive (which caused us to change the program to preserve the last save file) and maybe the avid forum-ites guessed the exponent and a less-than-reputable news outlet went with it. Anyway, I don't think GIMPS' reputation was not tarnished because GIMPS has never officially announced a new prime that was not independently verified.

Mini-Geek · 2013-01-28, 20:06

Quote:

Originally Posted by akruppa

They did not actually report the number, and specifically because the verification runs had not finished. Lots of news outlets jumped the gun, however, and reported that new Mersenne prime had been found (without telling what the exponent is, iirc). When the verification revealed a composite, they all had to back-pedal, which was bad enough publicity for GIMPS, even tho they hadn't officially announced a new prime. It would have been pretty embarassing if they had; all the more reason not to reveal the exponent until verification is finished.

Quote:

Originally Posted by Prime95

I don't remember that. Which new outlets / exponent was it?

I think I remember being slash-dotted prematurely with links to the forum thread where the ongoing verification was being run. I don't remember if that happened during a false positive.

I do remember the excitement during our first false positive (which caused us to change the program to preserve the last save file) and maybe the avid forum-ites guessed the exponent and a less-than-reputable news outlet went with it. Anyway, I don't think GIMPS' reputation was not tarnished because GIMPS has never officially announced a new prime that was not independently verified.

I guess I have a faulty memory, or maybe learned from someone else's bad memory (the incident mentioned was before I was involved with GIMPS, AFAIK). Thanks for the more accurate information on the earlier false positive.

Tony Reix · 2013-01-28, 20:24

Wonderful ! A new candidate Mersenne prime ! Nice work, guys !

I do not have access to any big Bull computer for checking this new candidate. But others should have access to big machines, for sure. How many days does it take today for checking such a big candidate ? maybe I have to read all the previous comments in this thread... I'll try to read them.

For now, I'm home, waiting for last medecine exams, since I had a (TRANSIENT !!) cerebral vascular accident 3 weeks ago. For now, they found no explanation... since my 54 years body is in perfect shape, the body of a sportman they said.

While waiting for news about checking this candidate, you could have a look at my last hobby : photography.
Look at: http://www.skeptic.com/ .
You may appreciate different kinds of photographs, like Paris or ... nice ladies.

Tony

henryzz · 2013-01-28, 21:17

Quote:

Originally Posted by Tony Reix

Wonderful ! A new candidate Mersenne prime ! Nice work, guys !

I do not have access to any big Bull computer for checking this new candidate. But others should have access to big machines, for sure. How many days does it take today for checking such a big candidate ? maybe I have to read all the previous comments in this thread... I'll try to read them.

For now, I'm home, waiting for last medecine exams, since I had a (TRANSIENT !!) cerebral vascular accident 3 weeks ago. For now, they found no explanation... since my 54 years body is in perfect shape, the body of a sportman they said.

While waiting for news about checking this candidate, you could have a look at my last hobby : photography.
Look at: http://www.skeptic.com/ .
You may appreciate different kinds of photographs, like Paris or ... nice ladies.

Tony

Can a mod add an adult warning for the link :)

2013-01-28, 14:51	#122
ATH Einyen Dec 2003 Denmark 2×1,579 Posts	Hmm, I found several exponents like the one dabaichi posted: http://mersenneforum.org/showpost.ph...9&postcount=95 without any "Unverified" line or "Assigned" line and nothing under http://www.mersenne.org/assignments, so they look like they are available for LL test, but the summary http://www.mersenne.org/primenet/ shows no available LL in the range in question. So is the summary bugged? or did these exponents "fall through the cracks" somehow? Last fiddled with by ATH on 2013-01-28 at 14:52

2013-01-28, 16:46	#125
chalsall If I May "Chris Halsall" Sep 2002 Barbados 9,767 Posts	Legal agreement... Just in case anyone hasn't actually read the Prime95/mprime EULA which they agreed to by running the program....

2013-01-28, 20:24	#131
Tony Reix Oct 2002 33₁₀ Posts	Waowww ! Wonderful ! A new candidate Mersenne prime ! Nice work, guys ! I do not have access to any big Bull computer for checking this new candidate. But others should have access to big machines, for sure. How many days does it take today for checking such a big candidate ? maybe I have to read all the previous comments in this thread... I'll try to read them. For now, I'm home, waiting for last medecine exams, since I had a (TRANSIENT !!) cerebral vascular accident 3 weeks ago. For now, they found no explanation... since my 54 years body is in perfect shape, the body of a sportman they said. While waiting for news about checking this candidate, you could have a look at my last hobby : photography. Look at: http://www.skeptic.com/ . You may appreciate different kinds of photographs, like Paris or ... nice ladies. Tony Last fiddled with by chalsall on 2013-01-28 at 21:25

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2013-01-28, 17:17	#126
butera Oct 2012 13 Posts	I'm glad to see a new prime after I rejoined the search a few months ago and started checking the forums regularly!

2013-01-28, 17:58	#127
LaurV Romulan Interpreter Jun 2011 Thailand 2×3×1,609 Posts	What a pity we found a new mersenne prime... Now Xyzzy and his minions will have a lot of things to do, for example remove all the references of the old record from the front page of the forum: "Most users ever online: 2^43,112,609-1 on 23 Aug 08", This and many things will have to be changed...