is 2 7395587 - 1
has 2226294 decimal digits
takes 1.613 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB4D7929BCCEA6038double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272129.311468.0556 %500000104194545018.09847.0148 %147.409870.2964 %
Target2674.017865.6716 %5000055000000.10972.4318 %4.127566.5065 %
Difference+5+125.2936+2.3839 %+450000+1036445450+17.9887+4.5829%+143.2823+3.7899 %

Known prime factors (1 factor, 103.7 bits, 0.00140199% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
73955871630651035313827590364539320113732103.6851102448686841103749009064
23 × 3 × 3803 × 58211 × 277297 × 748291111
2022-01-292772977482911112.439e+1012.97324.076

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-04-07Amperiov4_computers30000112500--0.0111.084%
2011-04-16James HeinrichQ660014000030800006--0.0953.719%
2022-01-29Oliver Kruse11700K5000001041945450232103.68520.7810.723%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-21ANONYMOUSv4_computers212610.021
1998-08-30JShaftv4_computers212620.042
1998-09-13ANONYMOUSv4_computers212630.133
2013-10-28NesowaManual testing2632640.265
2013-11-24David CampeauManual testing2642650.505
2015-06-21VictordeHollanderManual testing2652661.010
2016-10-10Gordon SpenceManual testing2662672.021
2018-07-23ramgeisManual testing2672684.042
2020-02-28TJAOIManual testing2682698.083
2021-08-19SRBaseManual testing26927016.17
2021-08-31SRBaseManual testing27027132.33
2021-09-28SRBaseManual testing27127264.67


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-15ANONYMOUSv4_computersB4D7929BCCEA60381.613
2002-08-03ANONYMOUSv4_computersB4D7929BCCEA60381.613


PRP results:
dateuseridcompidcofactorsres64
2022-01-30Oliver KruseIOS-6
16306510353138275903645393201137
235529540E23E987


CERT results:
dateuseridcompid
2022-01-30freiburgerSpeicher-Alt


P-1 factor-bounds graph:
B1 = 500000, B2 = 1041945450 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 140000, B2 = 3080000 (P-1 stage 2)
B1 = 140000 (P-1 stage 1)
B1 = 30000, B2 = 112500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
261
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
290
2100
2110
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Last modified: 2024-03-13T02:15:48+00:00