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Old 2014-12-30, 17:36   #1
mjm
 
May 2012

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Default New ECPP record

Peter Kaiser and Paul Underwood certified the primality of Lucas(140057) with Primo 4.1.0.
This is a 29271 decimal digit number! It is the new ECPP record.

See http://www.ellipsa.eu
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Old 2014-12-31, 11:27   #2
philmoore
 
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Congratulations to Peter and Paul, and also to Marcel Martin for the first ECPP record done by Primo!
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Old 2014-12-31, 12:51   #3
Puzzle-Peter
 
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Thanks!

It's not the first ECPP record set with Primo, there were several in the early 2000's. See the bottom of this page: http://ellipsa.eu/public/primo/top20.html
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Old 2015-09-16, 03:31   #4
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http://www.ellipsa.eu/public/primo/top20.html shows a new world record for ECPP. Congratulations to Philippe Alsina, Pierre Gazzano, Nik Lygeros, Olivier Rozier and André Solaris for their certification of Lehmer-Ramanujan(331,2129) with 29,492 decimal digits.
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Old 2015-09-23, 15:54   #5
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I pleased to announce a new ECPP record at 30,950 decimal digits. The proof of the Lucas Number V(148091) was started on 5th of January this year. It took until today to prove it using a 4x AMD 6174 (48 cores at 2.2GHz) and 100 days additionally spent in parallel on a AMD 1090T (6 cores at 3.2GHz) running phase 2 work.

I also congratulate Marcel Martin for his Primo program, which worked flawlessly.

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Old 2015-09-24, 05:43   #6
ldesnogu
 
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Congrats! You beat CIDE record
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Old 2016-11-23, 13:55   #7
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It is with great pleasure that I proudly announce a new record ECPP certification of a 34093 digits prime. Arranged in a 331 by 103 grid the digits of the prime depicts the Mersenne prime exponent 57,885,161.

The certification process took 14 months using a 4 x AMD 6174 (48 cores at 2.2 GHz) and 200 days additionally spent in parallel on an AMD 1090T (6 cores at 3.2 GHz) running phase 2 work.

Why 57,885,161 and not 74,207,281? The answer: Although the latter Mersenne prime exponent was reported to the server at about the same time certification started, it was not for another 3 months that the new exponent was noticed by a human! Rather than starting with the bigger exponent, I decided to continue with the smaller one. Besides, another even bigger one could have been found had I started with 74,207,281, or still might be discovered.

Again, Marcel Martin's Primo worked as a program par execellence.
Attached Files
File Type: zip picture_57885161.odt.zip (19.7 KB, 112 views)
File Type: pdf picture_57885161.pdf (9.0 KB, 319 views)

Last fiddled with by paulunderwood on 2016-11-23 at 14:15 Reason: Wrong exponent given
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Old 2016-11-23, 14:10   #8
axn
 
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Quote:
Originally Posted by paulunderwood View Post
75,885,161.
<snip>
75,885,161
Ahem... 57,885,161
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Old 2016-11-23, 14:16   #9
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Quote:
Originally Posted by axn View Post
Ahem... 57,885,161
Thanks for pointing out my error
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Old 2016-11-23, 23:09   #10
Jayder
 
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Congratulations! That's an interesting choice of number.
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Old 2016-11-24, 01:55   #11
Prime95
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I almost didn't read this addition to the thread - figuring it was just another bump in ECPP records.

However, your choice was pretty cool. Thumbs up!
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