is 2 6660677 - 1
has 2005064 decimal digits
takes 1.248 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE8668E822979FFB4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272143.579068.0556 %2000000101083521015.48148.3144 %159.060470.7116 %
Target2674.461165.6716 %4000040000000.06952.0987 %4.530666.3921 %
Difference+5+139.1180+2.3839 %+1960000+1006835210+15.4119+6.2157%+154.5298+4.3195 %

Known prime factors (1 factor, 107.5 bits, 0.00161422% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
666067723233192817530878127039640478484933107.51817440564087952979950115912
23 × 3 × 127931 × 1517939 × 1862891 × 2008777
2022-01-02186289120087772.844e+100.50841.0304

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-04-15PaJaSoftv4_computers30000255000--0.0111.417%
2012-02-25kurlyhex8000013600006--0.0412.767%
2019-03-04takahashivaio25000044000006--0.1294.290%
2020-08-03takahashivaio10000002300000012--0.5986.819%
2022-01-02Seth_TrManual testing20000001010835210233107.51818.9012.162%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-21ANONYMOUSv4_computers212620.046
2004-04-29David Campeauv4_computers212630.147
2014-06-29NesowaManual testing2632640.295
2014-07-10lycornManual testing2642650.561
2015-11-08snme2pm1Manual testing2652661.122
2016-04-20Gordon SpenceManual testing2662672.244
2018-02-27ANONYMOUSManual testing2672684.488
2020-06-05TJAOIManual testing2682698.975
2021-05-21takahashiManual testing26927017.95
2021-08-11SRBaseManual testing27027135.90
2021-09-25SRBaseManual testing27127271.80


ECM factoring results:
Total ECM effort:1.710 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.710


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29ANONYMOUSv4_computers9CF4C7407AF5BBF11.248
1999-09-14ANONYMOUSv4_computersE8668E822979FFB41.248
2001-05-13PaJaSoftv4_computersE8668E822979FFB41.248


PRP results:
dateuseridcompidcofactorsres64
2022-01-08Joe S.11600k
232331928175308781270396404784849
2377A6C5DDA6EFE4


CERT results:
dateuseridcompid
2022-01-08curtiscwcm128--34l


P-1 factor-bounds graph:
B1 = 2000000, B2 = 1010835210 (P-1 stage 2)
B1 = 1000000, B2 = 23000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 250000, B2 = 4400000 (P-1 stage 2)
B1 = 250000 (P-1 stage 1)
B1 = 80000, B2 = 1360000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 30000, B2 = 255000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
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