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Old 2013-06-19, 17:03   #1
R.D. Silverman
 
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Doesn't anyone care to comment on the p77 just found by Sam??
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Old 2013-06-19, 17:45   #2
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Quote:
Originally Posted by R.D. Silverman View Post
Doesn't anyone care to comment on the p77 just found by Sam??
Yes, I'll comment. Until a few seconds ago I wasn't aware that Sam had found a p77, presumably by ECM or you wouldn't have commented yourself.
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Old 2013-06-19, 17:51   #3
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Nothing on NUMBRTHRY or on PaulZ's ...or even Sam's own site.
"It's hard to make predictions, especially about the future." ~Y.B.
Anyway, it is smaller than p79. Let's wait for a p80!
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Old 2013-06-20, 01:46   #4
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Quote:
Originally Posted by R.D. Silverman View Post
Doesn't anyone care to comment on the p77 just found by Sam??
Neither on the (main) Cunningham tables or on the two "found but not
yet inserted" extension files. Maybe an Euler or Bernoulli? Sam was
saying that purdue has 90K cores suitable for distributed sieving
(small factor bases, maybe?). Not sure how many have enough
memory for the large B1's he's been using, but it's certainly more
that the c. 9K+ cores on the two clusters from the terragrid grant.

-Bruce

Yes, N188, the new 1st place Top10 of 2013.

Last fiddled with by bdodson on 2013-06-20 at 02:20 Reason: the Bernoulli
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Old 2013-06-20, 17:30   #5
R.D. Silverman
 
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Quote:
Originally Posted by bdodson View Post
Neither on the (main) Cunningham tables or on the two "found but not
yet inserted" extension files. Maybe an Euler or Bernoulli? Sam was
saying that purdue has 90K cores suitable for distributed sieving
(small factor bases, maybe?). Not sure how many have enough
memory for the large B1's he's been using, but it's certainly more
that the c. 9K+ cores on the two clusters from the terragrid grant.

-Bruce

Yes, N188, the new 1st place Top10 of 2013.
90k cores??? Holy <censored!>

I have 14 cores available half-time plus another 8 from older machines.
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Old 2013-06-20, 19:18   #6
Batalov
 
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N(188) c193, that was a good one!

That was a hole left after all the reasonable questions "Why factor N(200) cofactor, when there are smaller holes?" - "Because... you know..."

It is unclear though is NFS would have been faster than an appropriate amount of ECM curves (if not for luck). Because Sam is factoring similarly sized numbers now regularly with gnfs, it was probably pre-testing before running gnfs.
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Old 2013-06-21, 12:12   #7
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Congratulations!!
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Old 2013-06-21, 13:11   #8
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Exclamation That's quite fast!

B1 of 1 BILLION?! Wow! I never expected it to be that hard. And 90,000 cores is quite moderate for a supercomputer. Try doing it on the worlds fastest supercomputer and it'll be factored even quicker.

Last fiddled with by Stargate38 on 2013-06-21 at 13:12
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Old 2013-06-21, 15:33   #9
jasonp
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Quote:
Originally Posted by Stargate38 View Post
B1 of 1 BILLION?! Wow! I never expected it to be that hard. And 90,000 cores is quite moderate for a supercomputer. Try doing it on the worlds fastest supercomputer and it'll be factored even quicker.
Try getting ahead of all the other people in line to use the world's fastest supercomputer first :)

(If NFS@Home tried to use all of the supercomputer we've been spending time on, our quota would last maybe half a day)
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Old 2013-06-21, 17:15   #10
ixfd64
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It would be nice if they'd put even a small percentage of those cores towards GIMPS.
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Old 2013-06-21, 18:46   #11
YuL
 
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Default P77 found by ECM

Nice!!
By the way I didn't see any comment on the P76 reported about 3 weeks ago by Ryan P. (factor of 176^176+175^175 found with B1=26e7) and it doesn't appear in the top-50.
We only need a P74 and a P78 to have all P7x...
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