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Forum: Data 2021-04-21, 20:40
Replies: 428
Views: 61,059
Posted By Prime95
Unless, I've misunderstood the math (not an...

Unless, I've misunderstood the math (not an insignificant possibility) or there is a bug, then the estimate should be spot on. I'm using Mihai's P-1 smoothness probability estimator. Whereas, P-1...
Forum: Data 2021-04-21, 20:36
Replies: 428
Views: 61,059
Posted By Prime95
One P+1 run would be just like running one more...

One P+1 run would be just like running one more ECM curve. The P+1 "curve" stands little chance of success just like running one ECM curve. But at least P+1 would be faster than the one ECM curve....
Forum: Data 2021-04-21, 20:29
Replies: 428
Views: 61,059
Posted By Prime95
4.7M expo, TF to 2^68 On further thought...

4.7M expo, TF to 2^68

On further thought exponent size does not affect probability calculations. Only TF,B1,B2.

[Apr 21 16:25] P+1 on M4715201 with B1=250000, B2=5000000
[Apr 21 16:25] Chance...
Forum: Data 2021-04-21, 20:19
Replies: 428
Views: 61,059
Posted By Prime95
15.75M expo, 2^69 TF [Apr 21 16:14] P+1 on...

15.75M expo, 2^69 TF

[Apr 21 16:14] P+1 on M15750199 with B1=250000, B2=5000000
[Apr 21 16:14] Chance of finding a factor assuming no ECM has been done is an estimated 0.366%

[Apr 21 16:15]...
Forum: Data 2021-04-21, 20:11
Replies: 428
Views: 61,059
Posted By Prime95
31M expo, TF'ed to 2^75 [Apr 21 16:05] P+1...

31M expo, TF'ed to 2^75

[Apr 21 16:05] P+1 on M31500457 with B1=250000, B2=5000000
[Apr 21 16:05] Chance of finding a factor assuming no ECM has been done is an estimated 0.16%

[Apr 21 16:06]...
Forum: Data 2021-04-21, 20:00
Replies: 428
Views: 61,059
Posted By Prime95
You also need to clear the Pplus1BestB2 option to...

You also need to clear the Pplus1BestB2 option to get the quick probability at startup.

Now that I've fixed the crash bug reading stage 2 save file, I'll gather some of this data and post it here.
Forum: Data 2021-04-21, 19:35
Replies: 428
Views: 61,059
Posted By Prime95
You'll get better chances with smaller exponents...

You'll get better chances with smaller exponents -- less TF has been done. I was getting 1+% estimates in the 4.7M range with B1=1000000.
Forum: Data 2021-04-21, 19:33
Replies: 428
Views: 61,059
Posted By Prime95
P-1 and P+1 search space is almost completely...

P-1 and P+1 search space is almost completely independent.
Forum: Software 2021-04-21, 19:30
Replies: 175
Views: 15,470
Posted By Prime95
Fixed. Build 2 now available. Links in post...

Fixed. Build 2 now available. Links in post #150.
Forum: Data 2021-04-21, 17:26
Replies: 428
Views: 61,059
Posted By Prime95
Primenet accepts P+1 results, but does not...

Primenet accepts P+1 results, but does not recognize/coordinate P+1 assignments.
Forum: Data 2021-04-21, 17:24
Replies: 428
Views: 61,059
Posted By Prime95
We do know that P+1 is better than ECM -- roughly...

We do know that P+1 is better than ECM -- roughly the same chance of success but several times faster.

We do know that TF becomes more and more expensive the smaller the exponent. We also know...
Forum: Data 2021-04-21, 17:16
Replies: 428
Views: 61,059
Posted By Prime95
We're learning about best bounds selection...

We're learning about best bounds selection together.

I suggest picking one exponent and try a B1/B2 combination -- plus specify the TF bit level. Start prime95 and it will tell you the chance of...
Forum: Software 2021-04-21, 05:19
Replies: 53
Views: 13,179
Posted By Prime95
Requires changes to LLR code. The biggest...

Requires changes to LLR code.

The biggest change is "combo" functions, like (a+b)*c. This can be done with 3 reads and 1 write. Compare that to separate calls: a+b (2 reads, 1 write), sum * c...
Forum: Software 2021-04-21, 02:42
Replies: 175
Views: 15,470
Posted By Prime95
Yes, nth_run=3 selects a random starting value. ...

Yes, nth_run=3 selects a random starting value.

Given the massive number of exponents in need of P+1, I recommend not doing two P+1 runs on the same exponent. That said, do whatever you find fun.
Forum: Software 2021-04-21, 00:53
Replies: 53
Views: 13,179
Posted By Prime95
I don't know if Jean Penne is still the...

I don't know if Jean Penne is still the maintainer of LLR, but gwnum version 30.6 has some new features that might speed up LLR.
Forum: Data 2021-04-21, 00:47
Replies: 428
Views: 61,059
Posted By Prime95
New tool

Don't get too excited, but....

Prime95 30.6 has P+1 factoring available. Maybe this will help a tiny bit with some of the more stubborn ranges. See...
Forum: Software 2021-04-21, 00:40
Replies: 175
Views: 15,470
Posted By Prime95
For the adventurous

Prime95 version 30.6 build 2 is available.

I consider the new features to be lightly tested. No need to upgrade unless you are doing ECM or care to try out the new P+1 factoring work.

You...
Forum: PrimeNet 2021-04-20, 00:23
Replies: 4
Views: 150
Posted By Prime95
The server shows that the 100M expo is assigned...

The server shows that the 100M expo is assigned to you:

https://www.mersenne.org/report_exponent/?exp_lo=332646233&exp_hi=&full=1&ecmhist=1

Are all the others showing as assigned to you too? ...
Forum: Software 2021-04-19, 01:56
Replies: 175
Views: 15,470
Posted By Prime95
Can you send the save file and worktodo.txt? ...

Can you send the save file and worktodo.txt? Thanks.
Forum: PrimeNet 2021-04-19, 01:54
Replies: 9
Views: 259
Posted By Prime95
Yup, mea culpa, as Chris likes to say "stupid...

Yup, mea culpa, as Chris likes to say "stupid programmer error".
Forum: PrimeNet 2021-04-18, 23:06
Replies: 9
Views: 259
Posted By Prime95
Might have to bash me, off to check the Linux...

Might have to bash me, off to check the Linux code....
Forum: PrimeNet 2021-04-18, 20:43
Replies: 9
Views: 259
Posted By Prime95
Apparently someone at Microsoft thought it would...

Apparently someone at Microsoft thought it would be really cool if FindFirstFile returns xxx.proof.tmp when asking for all file names matching *.proof
Forum: Data 2021-04-14, 03:33
Replies: 17
Views: 555
Posted By Prime95
Yes, useless. I'm not even sure it will be...

Yes, useless.

I'm not even sure it will be useful to the let's get number of unfactored exponents below 20M crowd.

The biggest advantage I see to studying P+1 is that stage 2 should be faster...
Forum: Data 2021-04-14, 00:09
Replies: 17
Views: 555
Posted By Prime95
Lookup M4933 at mersenne.ca to see how 14620......

Lookup M4933 at mersenne.ca to see how 14620... factors.

To make understanding the P+1 algorithm even more complicated, the 50% of the time the algorithm misses P+1 factors, the algorithm was...
Forum: Data 2021-04-14, 00:04
Replies: 17
Views: 555
Posted By Prime95
Caveat: I'm not a P+1 expert. When we...

Caveat: I'm not a P+1 expert.



When we do P-1 on Mersenne numbers factors are of the form f=2kp+1, thus we find a factor f when k=(f-1)/(2p) is B1/B2-smooth.

With P+1, factors are of the...
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