Found a factor? Post it here. Or forever fold your crease. - Page 214

James Heinrich · 2023-08-27, 14:32

Quote:

Originally Posted by Jwb52z

(P-1, B1=537000, B2=19037844)

How much RAM does your P-1 system have? Your bounds seem... low?
mersenne.ca predicts approx B1=800k, B2=225M and you're getting B1=532k, B2=18M

Jwb52z · 2023-09-08, 00:48

P-1 found a factor in stage #2, B1=538000, B2=19051074.
UID: Jwb52z/Clay, M119159609 has a factor: 27387417648225305987147863 (P-1, B1=538000, B2=19051074)

84.502 bits.

Jwb52z · 2023-09-08, 00:50

Quote:

Originally Posted by James Heinrich

How much RAM does your P-1 system have? Your bounds seem... low?
mersenne.ca predicts approx B1=800k, B2=225M and you're getting B1=532k, B2=18M

Well, it's been so long since I set my account up that I don't really honestly remember what it's set to or where to find that setting anymore in GIMPS. My laptop only has 16 MB of RAM total.

moebius · 2023-09-11, 21:45

Found the following 13 factors in 1 month in the lower range of the 100 Million Digit Prime Award with mfaktc0.21 with 3 google accounts and 3 hours runtime per Tesla T4 instance. Much work has do be done and only a few people currently working in this range.

Code:

334450561	F	2023-08-07 Factor: 50854372402230817631209 / TF: 75-76
334460297	F	2023-08-07 Factor: 67509100414954238331463 / TF: 75-76
334456211	F	2023-08-07 Factor: 67973654565127585122127 / TF: 75-76
334460473	F	2023-08-08 Factor: 48204850879851045727519 / TF: 75-76
334458581	F	2023-08-11 Factor: 41207635439122241833703 / TF: 75-76
334467113	F	2023-08-14 Factor: 42986108424996234098177 / TF: 75-76
334556111	F	2023-08-17 Factor: 69490557327403764103457 / TF: 75-76
334557647	F	2023-08-21 Factor: 52286411798961515773831 / TF: 75-76
334552633	F	2023-08-21 Factor: 72377169472507464273193 / TF: 75-76
334558183	F	2023-08-22 Factor: 57147625128021294766369 / TF: 75-76
334558769	F	2023-08-23 Factor: 53096589804648253847273 / TF: 75-76
334652797	F	2023-09-03 Factor: 40620012368854589549353 / TF: 75-76
334808767	F	2023-09-11 Factor: 40585596615334757533663 / TF: 75-76

storm5510 · 2023-09-11, 22:31

From James Heinrich's project.

P-1 found a factor in stage #2, B1=925000, B2=391301820. M14143777 has a factor: 65619147676452806540729. 75.797 bits.
P-1 found a factor in stage #2, B1=925000, B2=391301820. M14143853 has a factor: 599234483141585673873226543. 88.953 bits.

I made a point to start checking these with YAFU after my last mistake with what appeared to be a really large factor. It was composite.

James Heinrich · 2023-09-11, 23:28

As soon as factors are submitted to mersenne.org (or mersenne.ca if >1G) they're automatically checked for primality and split if necessary.
Same if you format your result for posting here in the BBcode tool.
The mersenne.ca factorization tool will only split relatively small factors, but will quickly tell you if larger ones are prime.

storm5510 · 2023-09-11, 23:40

Quote:

Originally Posted by James Heinrich

As soon as factors are submitted to mersenne.org (or mersenne.ca if >1G) they're automatically checked for primality and split if necessary. Same if you format your result for posting here in the BBcode tool.

I much prefer to see what I am about to step in before I step in it, just in case.

storm5510 · 2023-09-12, 05:40

@James Heinrich

M14140717 has a 78.397-bit (24-digit) factor: 397902685379989857294169 (P-1,B1=960000,B2=517285860)
k = 2² * 3³ * 113 * 2389 * 482566417

I didn't think it would work with what I gave it, but it did. I won't do this with all the factors I find in your "poorly factored" list. Just some.

Happy5214 · 2023-09-12, 18:15

Quote:

Originally Posted by Jwb52z

Well, it's been so long since I set my account up that I don't really honestly remember what it's set to or where to find that setting anymore in GIMPS. My laptop only has 16 MB of RAM total.

Certainly you mean 16 GB? I have a late-90s-era IBM Aptiva with 32 MB of RAM. Certainly your laptop has more RAM than that ancient box.

storm5510 · 2023-09-12, 23:51

M14143529 has a 108.585-bit (33-digit) factor: 486710840366160325600510947689663 (P-1,B1=984000,B2=659334390)
k = 97 * 839 * 1303 * 16349 * 908627 * 10922657

Yesterday, I decided that I would not post anything < 30 digits, yet here is one. I suppose it might have something to do with B2.

storm5510 · 2023-09-13, 06:13

M14146823 has a 96.448-bit (30-digit) factor: 108063900922338799672720320959 (P-1,B1=984000,B2=659334390)
k = 67343 * 133949 * 315697 * 1341187

2023-09-11, 23:28	#2349
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 4,337 Posts	As soon as factors are submitted to mersenne.org (or mersenne.ca if >1G) they're automatically checked for primality and split if necessary. Same if you format your result for posting here in the BBcode tool. The mersenne.ca factorization tool will only split relatively small factors, but will quickly tell you if larger ones are prime. Last fiddled with by James Heinrich on 2023-09-11 at 23:50

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2023-09-08, 00:48	#2345
Jwb52z Sep 2002 1547₈ Posts	P-1 found a factor in stage #2, B1=538000, B2=19051074. UID: Jwb52z/Clay, M119159609 has a factor: 27387417648225305987147863 (P-1, B1=538000, B2=19051074) 84.502 bits.

2023-09-11, 22:31	#2348
storm5510 Random Account Aug 2009 Oceanus Procellarum 13×233 Posts	From James Heinrich's project. P-1 found a factor in stage #2, B1=925000, B2=391301820. M14143777 has a factor: 65619147676452806540729. 75.797 bits. P-1 found a factor in stage #2, B1=925000, B2=391301820. M14143853 has a factor: 599234483141585673873226543. 88.953 bits. I made a point to start checking these with YAFU after my last mistake with what appeared to be a really large factor. It was composite.

2023-09-12, 05:40	#2351
storm5510 Random Account Aug 2009 Oceanus Procellarum 13·233 Posts	@James Heinrich M14140717 has a 78.397-bit (24-digit) factor: 397902685379989857294169 (P-1,B1=960000,B2=517285860) k = 2² * 3³ * 113 * 2389 * 482566417 I didn't think it would work with what I gave it, but it did. I won't do this with all the factors I find in your "poorly factored" list. Just some.

2023-09-12, 23:51	#2353
storm5510 Random Account Aug 2009 Oceanus Procellarum 13·233 Posts	M14143529 has a 108.585-bit (33-digit) factor: 486710840366160325600510947689663 (P-1,B1=984000,B2=659334390) k = 97 * 839 * 1303 * 16349 * 908627 * 10922657 Yesterday, I decided that I would not post anything < 30 digits, yet here is one. I suppose it might have something to do with B2.

2023-09-13, 06:13	#2354
storm5510 Random Account Aug 2009 Oceanus Procellarum 3029₁₀ Posts	M14146823 has a 96.448-bit (30-digit) factor: 108063900922338799672720320959 (P-1,B1=984000,B2=659334390) k = 67343 * 133949 * 315697 * 1341187