is 2 4968559 - 1
has 1495686 decimal digits
takes 0.689 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE21CAB626311547Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual274770.015268.9189%500000001601351680501,763.026415.2398%2,533.041573.6556%
Target2651.468464.6154%340007000000.01412.4134%1.482565.4694%
Difference+9+768.5468+4.3035%+49966000+160134468050+1,763.0122+12.8263%+2,531.5590+8.1862%

Known prime factors (2 factors, 221.4 bits, 0.00445648% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
496855920246091420591356031247212580.744203742085185980040
23 × 3 × 5 × 7 × 32909 × 7370327309
2022-10-0432909737032730989,60680.713150.74
4968559223172809364276252160955328015257651469991143140.679224585045044525235748388343597467245
32 × 5 × 13697 × 578131 × 2052317 × 11533673 × 26625914303
2022-10-0411533673266259143033.351e+10293.75544.56

1 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-17Carsten Kossendeydurandal30000435000---0.010--0.571%
2011-07-27Squeeky_SquirrelT7500_220060000975000---0.022--0.917%
2015-04-19mikrMSI120000043100000---0.700--3.980%
2022-09-19Denial140Manual testing5000000050000000---10.05--5.030%
2022-10-04Denial140i5-84005000000016013516805067221.4231,7631.3773,52615.240%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23Mark RoseManual testing21261--0.062--
2009-12-14markroldgamer261262--0.062--
2011-11-13GrunwalderGIMPManual testing21263--0.321--
2016-02-23Mark RoseManual testing262263--0.198--
2014-12-29VictordeHollanderManual testing263264--0.395--
2014-12-29VictordeHollanderManual testing264265--0.752--
2015-07-29snme2pm1Manual testing265266--1.504--
2017-10-21YxinityManual testing266267--3.008--
2018-06-05ramgeisManual testing267268--6.016--
2021-03-15TJAOIManual testing268269--12.03--
2021-04-23-Anonymous-Manual testing269270--24.06--
2021-04-24-Anonymous-Manual testing270271--48.13--
2021-04-25-Anonymous-Manual testing271272--96.26--
2022-05-06Denial140Manual testing272273--192.5--
2022-06-27Denial140Manual testing273274--385.0--


ECM factoring results:
Total ECM effort:1.894 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.894


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-16ANONYMOUSv4_computersE21CAB626311547F0.689
2000-07-03ANONYMOUSv4_computersE21CAB626311547F0.689


PRP results:
dateuseridcompidcofactorsres64PRP
2022-10-04Denial140i5-8400
2024609142059135603124721
2231728093642762521609553280152576514699911
24F7BC62C903F666no


P-1 factor-bounds graph:
B1 = 50000000, B2 = 160135168050 (P-1 stage 2)
B1 = 50000000 (P-1 stage 1)
B1 = 1200000, B2 = 43100000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 60000, B2 = 975000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 30000, B2 = 435000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
107
108
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
2110
2120
2130
2140
2150
Last modified: 2022-10-04T07:09:30+00:00