is 2 1462973 - 1
has 440399 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-LEF403327EA3D853Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.310668.6567%500000150000000.07144.9334%20.382170.2030%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+20.2057+3.6567%+493500+14910000+0.0708+3.5343%+20.2765+4.7133%+4.7133%

Known prime factors (1 factor, 66.5 bits, 0.00454239% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14629731010766191702142846472166.45434544936635951
7 × 2579 × 3299 × 580033
2009-04-02329958003311.2250.00190.0033

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: 101076619170214284647
--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:25.574 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:25.574 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_computersEF403327EA3D853D0.056
2002-05-05T00:00:00Dave Zookv4_computersEF403327EA3D853D0.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:32:38Oliver KruseGTX-1
101076619170214284647
56648AE43BEB99__no
2017-10-27T22:04:17kkmrkkblmbrbkc4.xlarge
101076619170214284647
56648AE43BEB99__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