is 2 1465663 - 1
has 441209 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-L323BA6141EEA38D7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.273468.6567%500000150000000.07144.9345%20.344870.2034%1.5466%
PrimeNet2560.006562.5000%70001200000.00072.9101%0.007363.5913%1.0913%
GPU722600.104865.0000%65001000000.00061.4462%0.105465.5062%0.5062%
Difference+7+20.1686+3.6567%+493500+14900000+0.0708+3.4884%+20.2393+4.6972%+4.6972%

Known prime factors (1 factor, 65.5 bits, 0.00447019% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1465663528265475005404500812065.51818021382644080
24 × 5 × 158261 × 1423391
2009-04-1315826114233915.19850.01260.0178

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: 52826547500540450081
--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:25.582 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:25.582 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_computers323BA6141EEA38D70.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:55:23Oliver KruseGTX-1
52826547500540450081
D7F090C222BE20__no
2017-10-28T00:21:55kkmrkkblmbrbkc4.xlarge
52826547500540450081
D7F090C222BE20__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: 2022-03-17T11:21:24+00:00