is 2 1494719 - 1
has 449956 decimal digits
takes 0.067 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L870401827512D30Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.879368.6567%2000000600000000.33427.2518%20.213570.9297%2.2730%
PrimeNet2570.012863.1579%65001000000.00082.3387%0.013664.0195%0.8616%
GPU722610.205565.5738%6000500000.00050.9472%0.206165.8999%0.3261%
Difference+6+19.6738+3.0829%+1994000+59950000+0.3337+6.3046%+20.0074+5.0298%+5.0298%

Known prime factors (1 factor, 82.0 bits, 0.00548551% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
149471948123615229538707202378472581.9931609788034725547317
3 × 71 × 29231 × 258550521839
2016-07-1129231258550521839416,787912.341,704.0

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000285000---0.002--0.981%
2011-12-07T18:25:00markrtiny2750006000000---0.038--3.814%
2015-04-25T21:02:00alpertronManual testing200000060000000---0.334--7.252%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers21257--0.013--
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2016-02-23T16:28:35Mark RoseManual testing258260--0.077--
2010-05-08T05:20:00Architects Cubedm1_fw260261--0.103--
2016-02-23T16:28:35Mark RoseManual testing261262--0.206--
2011-05-28T03:14:00GrunwalderGIMPManual testing21263--1.068--
2016-02-23T16:28:35Mark RoseManual testing262263--0.657--
2015-04-07T04:32:00snme2pm1Manual testing263264--1.313--
2015-04-07T04:32:00snme2pm1Manual testing264265--2.500--
2015-09-25T08:59:39ramgeisManual testing265266--4.999--


ECM factoring results:

Old Calculation Method

Total ECM effort:31.113 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:31.113 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024813.81
50000500000030.167
250000400000005017.14


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers870401827512D30C0.067
2015-07-19T16:37:00MadPooManual testing870401827512D30C0.067


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T08:40:42Oliver KruseGTX-2
4812361522953870720237847
E819FC3135EE84__no
2017-10-29T00:16:00kkmrkkblmbrbkc4.xlarge
4812361522953870720237847
E819FC3135EE84__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 275000 (P-1 stage 1)
B1 = 20000, B2 = 285000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-21T11:50:27+00:00