|
2020-12-26, 10:21
|
#1 |
Dec 2011
After 1.58M nines:)
1,699 Posts |
Prime 95 P-1 method B1 and B2
I use P-1 with Prime95 to find some factors. Since my candidate reach near 3M digits, I decide to go little deeper with P-1 and now I save P-1 files.
So current B1=100000 and B2=1000000 Question: if I reuse P-1 file from those B1 and B2 limits what is new B1 and B2 limit I can make option a B1=200000 B2=2000000 option b B1=1000000 ( continue from "old" B2 limit) and B2 like 5000000 Thanks for any advice! Last fiddled with by pepi37 on 2020-12-26 at 10:37 |
|
|
|
2020-12-26, 17:54
|
#2 |
|
Bemusing Prompter
"Danny"
Dec 2002
California
9C816 Posts |
Unfortunately, no. If you want to change your B1 value after starting the second stage, then you'll have to start the whole thing over.
|
|
|
|
2020-12-26, 18:53
|
#3 | |
|
Dec 2011
After 1.58M nines:)
1,699 Posts |
Quote:
|
|
|
|
|
|
2020-12-26, 20:03
|
#4 |
|
Bemusing Prompter
"Danny"
Dec 2002
California
23×313 Posts |
Yes, you can extend B2 as long as you don't change the B1 value.
|
|
|
|
|
2020-12-26, 20:22
|
#5 | |
|
Dec 2011
After 1.58M nines:)
1,699 Posts |
Quote:
|
|
|
|
|
|
2021-01-04, 03:47
|
#6 |
"James Heinrich"
May 2004
ex-Northern Ontario
7×13×47 Posts |
.
Last fiddled with by James Heinrich on 2021-01-04 at 03:48 Reason: redacted for not reading original post properly |
|
|
|
|
2021-01-04, 06:07
|
#7 |
|
Romulan Interpreter
"name field"
Jun 2011
Thailand
41·251 Posts |
P95 does NOT extend B1/B2 properly. If you do a run with some B1/B2 then try to extend B1 (with or without extending B2), then you either need to run everything from scratch, or you may miss factors, depending on what combination of extensions you do. This happens WITH all the files saved properly (I don't talk about the case when you don't have the file from the first run, that case is obvious that you need to run everything from scratch). This was discussed before on the forum, and I don't think is fixed. If you want to extend B1, then P95 should only consider the prime powers fitting between LCM(B1) and LCM(B2), which it doesn't.
Last fiddled with by LaurV on 2021-01-04 at 06:13 |
|
|
|
 |
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| A Twin Prime Search Method | jzakiya | jzakiya | 12 | 2018-12-11 21:09 |
| New method of finding large prime numbers | georgelouis@mac | Math | 41 | 2011-01-25 21:06 |
| Montgomery method in Prime Numbers: ACP | SPWorley | Math | 5 | 2009-08-18 17:27 |
| Size of prime factors found by p-1 method | Robertcop | Math | 10 | 2006-04-30 22:23 |
| Question about record prime using Elliptical Curve method | jasong | Factoring | 0 | 2006-02-28 04:00 |
