20200822, 02:22  #56 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2×4,909 Posts 
They are the second part of the PRPVDF run. They prove that the PRP was run without errors and that the number is composite.

20200822, 02:27  #57 
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2^{4}·389 Posts 

20200822, 02:28  #58 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
10010100010110_{2} Posts 
Thanks.
Just as an aside, maybe it is a bit of a misnomer. It is like giving 99.9% of population "a certificate" of NOT being an MD or PhD :) Maybe these tests should be called "CONF", or "VAL", or "VER". 
20200822, 02:31  #59 
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2^{4}·389 Posts 
It's actually a certificate of proof of work. Not the end results of prime/composite.

20200822, 04:32  #60 
P90 years forever!
Aug 2002
Yeehaw, FL
3^{5}×31 Posts 
I think of CERT as short for certification. You are certifying the validity of the proof file (which showed the Mersenne number to be prime or composite).
Last fiddled with by Prime95 on 20200822 at 04:33 
20200822, 11:06  #61  
Einyen
Dec 2003
Denmark
2×1,579 Posts 
Quote:
If it was "only" a proof of work, it would not be enough to count as a double check. It would be nice to test that, if we had a known faulty machine and disabled Gerbicz error checking and see if the proof failed. Last fiddled with by ATH on 20200822 at 11:08 

20200825, 15:25  #62 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
1529_{16} Posts 
Another Ben Delo Cert sighting: https://www.mersenne.org/report_expo...exp_hi=&full=1

20200825, 23:33  #63  
"Mihai Preda"
Apr 2015
55B_{16} Posts 
Quote:
20190330 Kriesel NFPM1 B1=1340000, B2=6700000, e=2 20190124 Kriesel NFPM1 B1=1205000, B2=39655000, e=2 (the second round of P1 brought almost zero benefit) 

20200826, 00:31  #64 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
1010100101001_{2} Posts 
After this long, I can't be sure. Maybe it was intended to be B2=67M.

20210321, 00:47  #65 
Bemusing Prompter
"Danny"
Dec 2002
California
5×479 Posts 

20210321, 01:10  #66 
If I May
"Chris Halsall"
Sep 2002
Barbados
10011000100111_{2} Posts 
