mersenneforum.org > Data Thinking out loud about getting under 20M unfactored exponents
 Register FAQ Search Today's Posts Mark Forums Read

2021-07-17, 14:05   #573
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

7×677 Posts

Quote:
 Originally Posted by LaurV New personal record: Factor: 9011312357092040498877854764229760034322626753 ~152.659 bits

2021-07-17, 14:44   #574
PhilF

Feb 2005

22×167 Posts

Quote:
 Originally Posted by LaurV ~152.659 bits
Wow, that's a lot of bits. Can I have some?

 2021-07-18, 06:43 #575 tha     Dec 2002 11001100102 Posts Today I also got a new personal record: https://www.mersenne.org/report_expo...214847&full=1# 135.7 bits Just sharing the joy.
2021-07-18, 08:29   #576
LaurV
Romulan Interpreter

Jun 2011
Thailand

3·3,251 Posts

Quote:
 Originally Posted by tha Today I also got a new personal record

 2021-07-18, 16:36 #577 LaurV Romulan Interpreter     Jun 2011 Thailand 3×3,251 Posts Chris, is everything ok with the twok page? I seem to be unable to access it, regardless of the browser. It just shows an empty screen.
2021-07-18, 16:53   #578
chalsall
If I May

"Chris Halsall"
Sep 2002

3·37·89 Posts

Quote:
 Originally Posted by LaurV Chris, is everything ok with the twok page?
Thanks for pointing that out. Something weird with DNS on the server. Hacked a quick fix.

 2021-07-20, 11:46 #579 ZacHFX     Mar 2017 Halifax, NS 2×3×5 Posts Have started working on taking 12.2M to 71 bits.
 2021-07-21, 03:54 #580 LaurV Romulan Interpreter     Jun 2011 Thailand 3×3,251 Posts This 188 bits factor should have been a very nice record ... Except.... Code: Splitting composite factor 317126962428718354552798557405359962578621220783007834567 into: * 249515320122942257599965540869737 * 1270971907746835740860591 processing: P-1 factor 249515320122942257599965540869737 for M11886943 (B1=6,189,107, B2=185,673,210) (107.621 bits) CPU credit is 8.9141 GHz-days. processing: P-1 factor 1270971907746835740860591 for M11886943 (B1=6,189,107, B2=185,673,210) (80.072 bits) CPU credit is 8.9141 GHz-days. Grrr... Last fiddled with by LaurV on 2021-07-21 at 03:56
 2021-07-22, 18:42 #581 SethTro     "Seth" Apr 2019 36210 Posts I'm having bad luck. I've completed 406 TF assignments (203 TF=70, 203 TF=71) in the 14.65 range and found only one factor. My math for the odds of this (assuming 1/70 and 1/71 success) is odds of no factor: (69/70)^203 * (70/71)^203 = 0.003 odds of one factor: 1/70 * (69/70)^202 * (70/71)^203 * (406 choose 1) = 0.0178 I was starting to question my hardware (despite selftest and selftest2 both passing) but I guess this isn't too unreasonable (2% of the time I'd be writing this post).
2021-07-22, 19:35   #582
masser

Jul 2003

23×3×71 Posts

Quote:
 Originally Posted by SethTro I'm having bad luck. I've completed 406 TF assignments (203 TF=70, 203 TF=71) in the 14.65 range and found only one factor. My math for the odds of this (assuming 1/70 and 1/71 success) is odds of no factor: (69/70)^203 * (70/71)^203 = 0.003 odds of one factor: 1/70 * (69/70)^202 * (70/71)^203 * (406 choose 1) = 0.0178 I was starting to question my hardware (despite selftest and selftest2 both passing) but I guess this isn't too unreasonable (2% of the time I'd be writing this post).
Don't forget that your odds (1/70 and 1/71) are over-estimates; the assumption with those values is that no P-1 has been performed. I measured rates of 1/90 to 1/95 when I did the TF to 70 and 71 in the 14.0M range.

So, slightly unlucky, yes; but not too far out of the ordinary.

2021-07-22, 19:51   #583
petrw1
1976 Toyota Corona years forever!

"Wayne"
Nov 2006

7×677 Posts

Quote:
 Originally Posted by masser Don't forget that your odds (1/70 and 1/71) are over-estimates; the assumption with those values is that no P-1 has been performed. I measured rates of 1/90 to 1/95 when I did the TF to 70 and 71 in the 14.0M range. So, slightly unlucky, yes; but not too far out of the ordinary.
Yes, it depends a lot on how deep the P1 is; but that said stats are stats.

My record is 633 TF between factors; with 14 times over 400 attempts.
I also have more than 50 times with 2 factors in less than 10 attempts.
However, my average over 75,000 attempts still averages to about 1/100;
This is working in ranges with LOTS of P1 done.

Other ranges with standard levels if P1 are giving me averages of 1/85 attempts.

 Similar Threads Thread Thread Starter Forum Replies Last Post jschwar313 GPU to 72 3 2016-01-31 00:50 Batalov Factoring 6 2011-12-27 22:40 jasong jasong 1 2008-11-11 09:43 devarajkandadai Math 4 2007-07-25 03:01 WraithX GMP-ECM 1 2006-03-19 22:16

All times are UTC. The time now is 03:19.

Sat Sep 25 03:19:11 UTC 2021 up 63 days, 21:48, 0 users, load averages: 1.87, 2.00, 2.45