mersenneforum.org fond of a factor? Urn yourself to become remains
 Register FAQ Search Today's Posts Mark Forums Read

2021-04-02, 22:58   #1838
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

23×3×193 Posts

re: Post 1831

Quote:
 Originally Posted by James Heinrich You do (manual results form was changed several months ago to detect and handle this).
Seems it doesn't:

Code:
Manual testing	28722943	F	2021-04-02 22:40	0.0	Factor: 4578986428371835478041 / TF: 71-72	15.9100
Manual testing	28723249	F	2021-04-02 22:40	0.0	Factor: 3416851867143956961289 / TF: 71-72	8.8773
Manual testing	28725779	F	2021-04-02 22:40	0.0	Factor: 3325594725067066329023 / TF: 71-72	8.2263
Manual testing	28721831	NF	2021-04-02 22:40	0.0	no factor from 2^71 to 2^72	16.6513

Last fiddled with by petrw1 on 2021-04-02 at 23:00

2021-04-02, 23:59   #1839
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

1101000111002 Posts

Quote:
 Originally Posted by petrw1 Seems it doesn't
Sorry, you're right. The change I was thinking of relates to detecting whether the result claims to be full-range TF or not, and some related code that handles composite factors found by TF, but the actual PrimeNet code that calculates and applies credit is outside my zone-of-control, and does not currently have any mechanism for specifying whether a range was complete or not. The data is available to the manual results form, it just can't pass that information on to where the credit is calculated and applied. Such a change would need to be applied at the George level.

 2021-04-04, 15:46 #1840 firejuggler     Apr 2010 Over the rainbow 2·1,279 Posts M27151489 has a 76.836-bit (24-digit) factor: 134831419346216729059463 (P-1,B1=1350000,B2=109350000) low bit but k= 7 × 11 × 349 337 × 92 306 471 , really close to my B2 bound
 2021-04-08, 03:30 #1841 petrw1 1976 Toyota Corona years forever!     "Wayne" Nov 2006 Saskatchewan, Canada 23·3·193 Posts Double https://www.mersenne.org/report_expo...8190299&full=1 Factor: 4299246979573209796361 / TF: 71-72 Factor: 4001656651216207394857 / TF: 71-72 0.1 bits apart
 2021-04-09, 11:21 #1842 firejuggler     Apr 2010 Over the rainbow 2·1,279 Posts Found a new record for me M27155813 has a 112.563-bit (34-digit) factor: 7669084564727955238545079945517857 (P-1,B1=1350000,B2=109350000)
 2021-04-12, 17:10 #1843 Jwb52z     Sep 2002 14248 Posts P-1 found a factor in stage #2, B1=746000, B2=20430000. UID: Jwb52z/Clay, M103478927 has a factor: 118012953390073941784591 (P-1, B1=746000, B2=20430000). 76.643 bits.
 2021-04-15, 18:55 #1844 gLauss   Nov 2014 1E16 Posts Finally, after hundreds of attempts (and thousands of curves) found my first factor with ECM Even if it is only 71bits, it shows that it is possible! 3255283
2021-04-15, 20:13   #1845
masser

Jul 2003

7·229 Posts

Quote:
 Originally Posted by gLauss Finally, after hundreds of attempts (and thousands of curves) found my first factor with ECM Even if it is only 71bits, it shows that it is possible! 3255283
Congrats! Nice find - may it be the first of many!

 2021-04-16, 01:19 #1846 James Heinrich     "James Heinrich" May 2004 ex-Northern Ontario 22·839 Posts Ryan strikes again. #11 on the all time biggest Mersenne factors list. M4283 has a 219.268-bit (67-digit) factor: 1014581894481062086635266411284139009925301539055947709872564246847 (ECM,B1=260000000,B2=3142865025316,Sigma=6655636513802850625) Last fiddled with by James Heinrich on 2021-04-16 at 01:21
2021-04-16, 14:14   #1847
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

23·3·193 Posts
Almost....Laurv

Quote:
 Originally Posted by LaurV Congrats, triple 59, next one you will find will start with a quadruple 69...
Factor ends with ... let's see 1, 2, 3: 69.
Exponent ends with 369; and starts with 396.
Exponent has 5 out of 8 digits 6 or 9: 40%
Factor has 9 out of 23 digits 6 or 9: 39%.
Time found contains a 6 and a 9.

Code:
39626369	F-PM1	2021-04-16 06:19	Factor: 35172309356636629912369

2021-04-16, 15:31   #1848
Viliam Furik

"Viliam Furík"
Jul 2018
Martin, Slovakia

45210 Posts

Quote:
 Originally Posted by petrw1 Factor ends with ... let's see 1, 2, 3: 69. Exponent ends with 369; and starts with 396. Exponent has 5 out of 8 digits 6 or 9: 40% Factor has 9 out of 23 digits 6 or 9: 39%. Time found contains a 6 and a 9. Code: 39626369 F-PM1 2021-04-16 06:19 Factor: 35172309356636629912369
I'm pretty sure that's supposed to be 62.5%

 Similar Threads Thread Thread Starter Forum Replies Last Post siegert81 FermatSearch 2 2018-01-24 04:35 rogue Lounge 10 2008-11-21 05:25 aaa120 Factoring 17 2008-11-13 19:23 fivemack ElevenSmooth 4 2008-05-07 19:28 dsouza123 Software 12 2003-08-21 18:38

All times are UTC. The time now is 03:35.

Thu May 6 03:35:13 UTC 2021 up 27 days, 22:16, 0 users, load averages: 3.48, 2.99, 3.02