20210417, 08:54  #144  
"Viliam FurÃk"
Jul 2018
Martin, Slovakia
1001100111_{2} Posts 
Quote:


20210417, 21:16  #145 
"Alexander"
Nov 2008
The Alamo City
2×349 Posts 

20210417, 23:29  #146  
Bemusing Prompter
"Danny"
Dec 2002
California
5·479 Posts 
Quote:


20210418, 23:24  #147 
"Alexander"
Nov 2008
The Alamo City
2×349 Posts 
That didn't help, nor did restarting mprime completely and resuming from there. Will mprime be able to figure out when this test is actually done, display issues aside, or do I need to restart the test/release the exponent?

20210419, 01:56  #148 
P90 years forever!
Aug 2002
Yeehaw, FL
3^{5}·31 Posts 
Can you send the save file and worktodo.txt? Thanks.

20210420, 07:05  #149 
"Alexander"
Nov 2008
The Alamo City
2×349 Posts 
I don't have them anymore, because the assignment already finished and got uploaded to PrimeNet (no factor found). You got the PRP test (it was 103482079, for future reference). I'll send the files if/when it happens again with another exponent. Sorry for not being helpful.

20210421, 00:40  #150 
P90 years forever!
Aug 2002
Yeehaw, FL
3^{5}·31 Posts 
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 could be the first to find a new factor using P+1. I've tried about 10 times without success. Think of P+1 as a special fast ECM curve  same chances of success, several times faster than ECM, but you only get to do it once. My thoughts are to choose B1 well above the current B1's being handed out by the server for ECM. For the few exponents I tried in the 4.7M area, ECM is presently being done at B1=50K, I chose P+1 with B1=1M. From whatsnew.txt: Code:
1) P+1 factoring. A worktodo.txt entry looks like this: Pplus1=k,b,n,c,B1,B2,nth_run[,how_far_factored][,"known_factors"] Unlike P1, the fact that factors of Mersenne numbers is 1 mod 2p is of no value. Thus, P1 is vastly more effective at finding factors. A P+1 run is about as valuable as running one ECM curve. P+1 stage 1 is 50% slower than P1 stage 1 but several times faster than ECM stage 1. P+1 stage 2 is a little faster than P1 stage 2 which in turn is a little faster than ECM stage 2. Unlike P1, P+1 has only a 50% chance of finding a factor if factor+1 is B1/B2 smooth. Thus, it makes sense to do 1 or 2 (maybe 3) runs. That is what the nth_run argument is for. There are two special starting values for P+1 that have a slightly higher chance of finding a factor. These special starting values correspond to nth_run=1 and nth_run=2. Like P1, if how_far_factored is specified, prime95 will ignore B2 and calculate the best B2 value for the given B1. 2) Faster ECM stage 1 when factoring exponents near the limit of an FFT size. 3) Gwnum library new functions give a programmer more tools to reduce normalized adds. A tutorial.txt file is now available to help a programmer use the gwnum library. Before downloading, make sure prime.spl is uploaded to the server. There is a bug reading spool files created by previous versions. Windows 64bit: https://mersenne.org/ftp_root/gimps/p95v306b2.win64.zip Linux 64bit: https://mersenne.org/ftp_root/gimps/...linux64.tar.gz Last fiddled with by Prime95 on 20210423 at 05:12 
20210421, 02:24  #151 
Jul 2003
wear a mask
2^{2}·419 Posts 
George, this is excellent. Thank you!
Would it be possible to add another value to nth_flag, like 1, that signals to the code to run each of the (2, 3?) starting seeds? Also, it's not clear how to make the code do 3 distinct runs on the same number with the same bounds. Last fiddled with by masser on 20210421 at 02:28 Reason: I guess I should try nth_run = 3... 
20210421, 02:42  #152  
P90 years forever!
Aug 2002
Yeehaw, FL
3^{5}×31 Posts 
Quote:
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. 

20210421, 04:17  #153 
Jun 2003
2·3·7·11^{2} Posts 
Is the server set up to handle P+1 result submissions (both "no factor" as well as "factor found")?
Is mersenne.ca? Last fiddled with by axn on 20210421 at 04:17 
20210421, 04:49  #154 
"James Heinrich"
May 2004
exNorthern Ontario
11×311 Posts 
