is 2 1996549 - 1
has 601022 decimal digits
takes 0.131 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2903E0957E34E865double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26829.854069.1176%19965492495686251.47638.5055%31.330271.7444%2.6267%
PrimeNet2580.019263.7931%80001400000.00142.4780%0.020764.6903%0.8972%
GPU722620.307766.1290%80001100000.00131.2362%0.309066.5477%0.4187%
Difference+6+29.5462+2.9886%+1988549+249458625+1.4750+7.2693%+31.0212+5.1966%+5.1966%

Known prime factors (1 factor, 70.6 bits, 0.00353511% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
199654917651101613115143955912270.580442040280832455
3 × 5 × 29469352055497
2020-01-21529469352055497227.40153,071285,894

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-03-04T05:40:00kurlyhex100000030000000---0.246--5.711%
2018-01-29T17:13:56Jocelyn Larouchelow 4M19965493000000012---0.336--6.075%
2018-02-16T12:53:18Jocelyn Larouchelow 4M19965496000000012---0.492--6.863%
2018-03-09T12:48:32Jocelyn Larouchelow 4M199654912000000012---0.803--7.659%
2018-05-14T10:22:17Jocelyn Larouchelow 4M199654919965490012---1.217--8.247%
2018-11-26T12:53:48Jocelyn LaroucheManual testing199654924956862512---1.476--8.506%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-02T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:02Mark RoseManual testing258260--0.058--
2009-12-06T20:58:00S485122USB-W260261--0.077--
2016-02-23T16:29:02Mark RoseManual testing261262--0.154--
2011-07-01T19:07:00GrunwalderGIMPManual testing21263--0.799--
2016-02-23T16:29:02Mark RoseManual testing262263--0.492--
2015-03-03T09:04:00lycornManual testing263264--0.983--
2015-03-03T09:05:00lycornManual testing264265--1.871--
2015-09-12T12:52:00ramgeisManual testing265266--3.743--
2017-05-05T17:07:22TJAOIManual testing266267--7.486--
2019-05-19T20:32:08chuenkitManual testing267268--14.97--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.412 GHz-days
Estimated T-Level:3.200
DigitsB1CurvesCompleteFacMiss
201100064 / 1000.64052.560%
255000064 / 2800.22979.534%

New Calculation Method

Total ECM effort:5.412 GHz-days
Estimated T-Level:3.200
DigitsB1CompleteFacMiss
20110002.06512.688%
25500000.18782.978%
302500000.01198.858%


ECM Summary

B1B2factorcurvesGHz-days
500005000000635.328
50000500000010.085


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00ANONYMOUSv4_computers2903E0957E34E8650.131
2015-07-12T18:10:00MadPooManual testing2903E0957E34E8650.131


PRP results:
dateuseridcompidcofactorsres64PRP
2020-01-22T02:41:20Niels_Mache_NextcloudSuperDry-X
1765110161311514395591
84727BFA0E6B70CCno
2020-01-23T05:20:12marssystemsSYSTEM01
1765110161311514395591
84727BFA0E6B70CCno


P-1 factor-bounds graph:
B1 = 1996549, B2 = 249568625 (P-1 stage 2)
B1 = 1996549, B2 = 199654900 (P-1 stage 2)
B1 = 1996549, B2 = 120000000 (P-1 stage 2)
B1 = 1996549, B2 = 60000000 (P-1 stage 2)
B1 = 1996549, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1996549 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-01-23T05:20:12+00:00