is 2 1465777 - 1
has 441243 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCCC6E3DAFF70DAF5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.271868.6567%500000150000000.07144.9346%20.343270.2034%1.5467%
PrimeNet2560.006562.5000%70001200000.00072.9102%0.007363.5913%1.0913%
GPU722600.104865.0000%65001000000.00061.4462%0.105465.5062%0.5062%
Difference+7+20.1670+3.6567%+493500+14900000+0.0708+3.4884%+20.2378+4.6972%+4.6972%

Known prime factors (1 factor, 71.5 bits, 0.00487730% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
146577733168380788919689066792271.4901131426567237707
132 × 41 × 394039 × 414397
2009-04-13394039414397367.620.02190.0444

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000265000---0.002--0.956%
2016-03-17T19:14:42alpertronManual testing5000001500000012-
skipped known factor: 3316838078891968906679
--0.071--4.935%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-06T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.583 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.583 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025111.90
250000350000005013.68


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00ANONYMOUSv4_computersCCC6E3DAFF70DAF50.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:56:39Oliver KruseGTX-3
3316838078891968906679
1D0996BB27FE62__no
2017-11-05T01:34:31kkmrkkblmbrbkc4.xlarge
3316838078891968906679
1D0996BB27FE62__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2022-03-17T11:21:26+00:00