20201010, 16:23  #1695  
"James Heinrich"
May 2004
exNorthern Ontario
3×1,061 Posts 
Quote:
and you get your 241 digits: Code:
7993740247389956264853174304168322255931238346246097321873539588852601041591321387921101681164706423023658390690691167622105779566348116865818161116278520751265794272168974387055181655888422451232542011347384356257680009348025432182336941183 Code:
***factors found*** P18 = 138325941036565103 P29 = 57644473457648767005697802783 P25 = 9280993516297855054039457 P171 = 108017532617736915133406584684682016398182243100347598313436462729073911856247557922662614974708675029796424611721425364738654561651249349759454300640753645387500306111631 Last fiddled with by James Heinrich on 20201010 at 16:25 

20201010, 17:03  #1696  
Random Account
Aug 2009
U.S.A.
2^{3}×211 Posts 
Quote:
Quote:


20201010, 22:39  #1697  
"James Heinrich"
May 2004
exNorthern Ontario
3·1,061 Posts 
Quote:
@LaurV: since you brought it up, would you care to compile a list of the factors for which discover names are known but my site shows anonymous, please? Thanks! 

20201011, 07:49  #1698 
Romulan Interpreter
Jun 2011
Thailand
10001011100100_{2} Posts 
If I can't keep my mouth shut... hihi.
Edit: Ok, I will look into it. Edit 2: At first sight, [J. Bos/T. Kleinjung/A. Lenstra/P. Montgomery]'s factors, they factored many low mersennes by ECM and SNFS, but because none of them is member of Gimps, such factors were added to PrimeNet's DB like "anonymous". Or, in George's name (probably, he added the factor to the DB, there is no intention in "stealing" their factors)  the case for M1237. Last fiddled with by LaurV on 20201011 at 08:11 
20201012, 09:48  #1699 
Jul 2018
Martin, Slovakia
100_{16} Posts 
Almost top 3
M10017487 has a 162.539bit (49digit) composite (P23+P27) factor: 8492545109166755533258311668299806208565163467423 (P1,B1=5000000,B2=150000000)
When I found this beauty in results.txt, I said: "Well, that will be composite...". It was... 
20201012, 17:09  #1700  
Random Account
Aug 2009
U.S.A.
3230_{8} Posts 
Quote:


20201012, 17:13  #1701 
Jul 2003
wear a mask
2·3·5·7^{2} Posts 

20201012, 19:43  #1702  
"James Heinrich"
May 2004
exNorthern Ontario
110001101111_{2} Posts 
Quote:
There is an odd 4th case: M1471 which Zimmermann credits to Ryan Propper on 2017Aug31 but GIMPS data has kkmrkkblmbrbk reporting it on 20170903. It's possible that it was discovered outside GIMPS and reported (but not actually discovered) by kkmrkkblmbrbk a few days later (edit: this seems to support that), since I don't think Ryan Propper joined GIMPS until around 2019Apr (at least that's when factors with his name on them start appearing). So, should I change the credit for M1471 to Ryan? 

20201012, 21:09  #1703  
Jun 2012
Boulder, CO
D4_{16} Posts 
Quote:
Code:
GMPECM 6.4.4 [configured with GMP 6.0.0, enableasmredc] [ECM] Input number is 414112359191997701534253596492500106450300358197797860629666662626749053242608219494442402695651576837870340296832489287087736334825594271746068631644666774347474623919652707232075336460653035066984955186871523283455060667679907961096868238556949992989771660891724444656348335990462979243681517917537081864618887895837966964799536787373376827405632123493586648835674823827101723072520023440275366679460254103690151 (414 digits) Using special division for factor of 2^14711 Using B1=850000000, B2=15892628251516, polynomial Dickson(30), sigma=1149118327 dF=524288, k=5, d=5705700, d2=17, i0=132 Expected number of curves to find a factor of n digits: 35 40 45 50 55 60 65 70 75 80 15 47 168 661 2867 13623 69471 381778 2221086 1.4e+07 Step 1 took 10424603ms Using 47 small primes for NTT Estimated memory usage: 4389M Initializing tables of differences for F took 13531ms Computing roots of F took 265269ms Building F from its roots took 107976ms Computing 1/F took 43111ms Initializing table of differences for G took 3177ms Computing roots of G took 275418ms Building G from its roots took 114795ms Computing roots of G took 296465ms Building G from its roots took 121469ms Computing G * H took 20867ms Reducing G * H mod F took 22248ms Computing roots of G took 303952ms Building G from its roots took 134736ms Computing G * H took 21110ms Reducing G * H mod F took 23203ms Computing roots of G took 291818ms Building G from its roots took 117351ms Computing G * H took 20115ms Reducing G * H mod F took 22810ms Computing roots of G took 305851ms Building G from its roots took 124813ms Computing G * H took 19687ms Reducing G * H mod F took 20117ms Computing polyeval(F,G) took 207279ms Computing product of all F(g_i) took 1019ms Step 2 took 2901560ms ********** Factor found in step 2: 61491618977549042678155153540458255504752992030160252118535699943713 Found probable prime factor of 68 digits: 61491618977549042678155153540458255504752992030160252118535699943713 Probable prime cofactor 6734452045297304612995050904133968305694025489494814555211753778337449397088976789153790263210262363727443589087252640846370390818555151954319223922183531363828896443099275063889485014446803977469139684639880343219143574884603136545584618534007354180853969730250054739420717651286559832852943449096627017735640776807663419415624956377103688592327 has 346 digits 

20201012, 22:11  #1704 
"James Heinrich"
May 2004
exNorthern Ontario
3183_{10} Posts 
Thanks Ryan for the confirmation. I have adjusted the discovery credit/date and added B1/B2/Sigma details to the record.
If there are any factors of your discovery that are improperly credited (e.g. anonymous results presumably predating your involvement with GIMPS) please let me know and I can adjust accordingly. 
20201013, 03:44  #1705  
Romulan Interpreter
Jun 2011
Thailand
2^{2}·7·11·29 Posts 
Quote:
Edit: yep, that's the thread (I clicked on your link). Last fiddled with by LaurV on 20201013 at 03:48 

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