is 2 1462891 - 1
has 440375 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-LDF733D9C247AA2FDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.311868.6567%500000150000000.07144.9334%20.383270.2030%1.5463%
PrimeNet2560.006662.5000%70001200000.00072.9091%0.007363.5909%1.0909%
GPU722600.105065.0000%6500900000.00061.3991%0.105665.4897%0.4897%
Difference+7+20.2068+3.6567%+493500+14910000+0.0708+3.5343%+20.2776+4.7133%+4.7133%

Known prime factors (1 factor, 92.0 bits, 0.00628750% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
146289148810761749274727750758123992891.9791668297971252633577989
11 × 43 × 617 × 661 × 2273 × 3889 × 978337
2009-01-263889978337358,313,3650.00320.0055

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.840%
2016-03-17T19:14:39alpertronManual testing5000001500000012-
skipped known factor: 4881076174927472775075812399
--0.071--4.933%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.573 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:25.573 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
250000350000005013.67


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00Dave Zookv4_computersDF733D9C247AA2FD0.056
2002-05-05T00:00:00Dave Zookv4_computersDF733D9C247AA2FD0.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:31:51Oliver KruseGTX-3
4881076174927472775075812399
AAE3C24162E14C__no
2017-10-27T23:46:04kkmrkkblmbrbkold
4881076174927472775075812399
AAE3C24162E14C__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2022-03-10T10:40:17+00:00