mersenneforum.org > Data Thinking out loud about getting under 20M unfactored exponents
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2021-09-16, 18:46   #749
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

19×251 Posts

Quote:
 Originally Posted by masser It's been great fun! (I started when the range was at 2242 in late March 2020; a nice pandemic distraction) My hunch is that 17.0 is the most difficult of the remaining dense ranges. The project certainly has the firepower to finish off this task: push the TF bit level to an extreme (like 74,75 bits) then P-1 with B1 = 10M ought to do it.
Yes, we currently have a "ton" of TF firepower.
Let's hope it hangs around for a while longer.
I see light at the end of the tunnel!!!

2021-09-16, 21:42   #750
lycorn

"GIMFS"
Sep 2002
Oeiras, Portugal

149410 Posts

Quote:
 Originally Posted by petrw1 I see light at the end of the tunnel!!!
Hope it´s not the headlight of an oncoming train, to quote Mr Murphy...

Last fiddled with by lycorn on 2021-09-16 at 21:44

2021-09-17, 01:11   #751
chalsall
If I May

"Chris Halsall"
Sep 2002

23×433 Posts

Quote:
 Originally Posted by lycorn Hope it´s not the headlight of an oncoming train, to quote Mr Murphy...
Would anyone like to coordinate the last bit of P-1'ing needed in 22.1, 22.7, and 22.8M?

Oliver "did his thing".

 2021-09-17, 02:50 #752 petrw1 1976 Toyota Corona years forever!     "Wayne" Nov 2006 Saskatchewan, Canada 19·251 Posts Under 20,500,000 Less than 500,000 to go until the entire range (to 999,999,993) is under 20M factors. https://www.mersenne.ca/status/tf/0/0/1/0 I know this shows 3 to go but there have been more than 3 factors found since this report was produced. 1 year ago it was: 20,872,807 2 years ago it was: 21,198,206
2021-09-17, 04:09   #753
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

19·251 Posts
I guess as the "inventor" of this project...

Quote:
 Originally Posted by chalsall Would anyone like to coordinate the last bit of P-1'ing needed in 22.1, 22.7, and 22.8M? Oliver "did his thing".
Most importantly speak for your ranges to avoid toe stepping

There are actually 21 ranges that Oliver has completed to 74 bits (22.8 is special ... he is finished).
P.S. within a few weeks he will probably complete the rest (fingers crossed)

I have ordered them by "ToGo".
Then I have suggested P1 effort.
Always work on the exponents with B1=B2 first.
Do not fear that some ranges have NO B1=B2 remaining.
Most of these exponents have had very meagre P1 based on today's hardware.
In these cases look for low B1/B2 here .
Sort by B2 (click on the column) and start at the top.
The top exponents will likely have a current P1 success rate of under 2%; most will be under 3%
Choosing a B1/B2 that give 4% (+2%) for example will require on average 50 exponents per factor.
Each assignment will take about 2 GhzDays ... not a whole lot, right?

Code:
Range	To Go	B1=B2	Low P-1
This first bunch have so few remaining; don't pick B1/B2 with over 3-4% success rate
22.8M	1		302
29.6M	1	579	122
25.1M	2	497	162
24.6M	3		189
22.1M	4		265
23.6M	7	602	258
27.4M	9	761	163
22.7M	10	130	322
26.3M	10	722	145
28.1M	17	679	161
27.3M	17	712	153
27.7M	23	770	159
28.2M	24	610	157
28.5M	24	330	153
28.9M	25	643	154
27.5M	26	382	175

For these we'll need about a 5-5.5% success rate
27.8M	41	791	179
29.0M	47	715	176
28.0M	50	531	163

These 7-8% but probably better another bit of TF and then something more reasonable
27.2M	89	821	150
29.8M	113	789	100
Does anyone need actual recommended B1/B2 for PMinus1 or B1 for PFactor?

2021-09-17, 14:22   #754
chalsall
If I May

"Chris Halsall"
Sep 2002

995910 Posts

Quote:
 Originally Posted by petrw1 Most importantly speak for your ranges to avoid toe stepping
OK... I had actually mentioned 22.xM for a reason...

I'm personally working 29.6M, 24.6M, and 27.4M. The GPU72 Colab P-1'ers are working 25.1M, and will then move to 23.6M.

Last fiddled with by chalsall on 2021-09-17 at 14:37 Reason: Dyslexic moment.

2021-09-17, 15:19   #755
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

19·251 Posts

Quote:
 Originally Posted by chalsall OK... I had actually mentioned 22.xM for a reason... I'm personally working 29.6M, 24.6M, and 27.4M. The GPU72 Colab P-1'ers are working 25.1M, and will then move to 23.6M.
Oops...

Okay consider these 5 spoken for.

Code:
Range	To Go	B1=B2	Low P-1
This first bunch have so few remaining; don't pick B1/B2 with over 3-4% success rate
22.8M	1		302  Kruoli
29.6M	1	579	122  Chris
25.1M	2	497	162  Chris
24.6M	3		189  Chris
22.1M	4		265  Kruoli
23.6M	7	602	258  Chris
27.4M	9	761	163  Chris
22.7M	10	130	322  Kruoli
26.3M	10	722	145  Kruoli
28.1M	17	679	161  Kruoli
27.3M	17	712	153  Kruoli
27.7M	23	770	159
28.2M	24	610	157
28.5M	24	330	153
28.9M	25	643	154
27.5M	26	382	175

For these we'll need about a 5-5.5% success rate
27.8M	41	791	179
29.0M	47	715	176
28.0M	50	531	163

These 7-8% but probably better another bit of TF and then something more reasonable
27.2M	89	821	150
29.8M	113	789	100

Last fiddled with by petrw1 on 2021-09-29 at 17:21 Reason: Speling

 2021-09-17, 15:33 #756 kruoli     "Oliver" Sep 2017 Porta Westfalica, DE 5×7×19 Posts I'd like to take 22.1M 22.7M and 22.8M, I guess that shouldn't take long.
2021-09-17, 21:28   #757
chalsall
If I May

"Chris Halsall"
Sep 2002

23×433 Posts

Quote:
 Originally Posted by kruoli I'd like to take 22.1M 22.7M and 22.8M, I guess that shouldn't take long.
Excellent. [/Burns]

And, it's of course a function of the compute you have available. But, likely, no... Not long in the temporal domain.

 2021-09-23, 09:47 #758 LaurV Romulan Interpreter     Jun 2011 Thailand 2·3·7·233 Posts Trivia: Since I joined this search ~100 days ago, there were 10563 factors found, from which I found 563 and the "others" found exactly 10000. That is ten thousands factors, sharp! Which you, guys, found in 100 days sharp... (about, actually there are 102 days, but don't tell anybody!) Which is a good opportunity to boast... For a while I was founding ~80% of the factors, till SRBase joined, and my percent decreased to ~30%, then Oliver started to report his "bucket" of factors, and I went to about 10%. Since I stopped (as mentioned in former posts), people continued to report factors, and I am now at the shown ~5% from the whole amount. When I joined, there were 214 "ranges" to go, currently there are only 181. From the 33 "killed" ranges, I have found 549 of the total 2530 factors, which puts me at ~21% of the "killed ranges' factors". I was at about 40% when I "left", as there were about 7 or 8 ranges closed since. Last fiddled with by LaurV on 2021-09-23 at 09:49
2021-09-23, 12:32   #759
PhilF

"6800 descendent"
Feb 2005

10101010012 Posts

Quote:
 Originally Posted by LaurV Trivia: Since I joined this search ~100 days ago, there were 10563 factors found, from which I found 563 and the "others" found exactly 10000. That is ten thousands factors, sharp! Which you, guys, found in 100 days sharp... (about, actually there are 102 days, but don't tell anybody!)
There has just GOT to be some numerology there that will tell us where the next Mersenne prime is hiding, no?

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