is 2 3573761 - 1
has 1075810 decimal digits
takes 0.375 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP860BBC401F637673verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271133.774669.0141%5000001303648501.15375.3628%134.928270.6758%1.6617%
PrimeNet2600.043063.3333%150003000000.00462.9713%0.047664.4228%1.0895%
GPU722640.996065.6250%200004000000.00621.9778%1.002266.3049%0.6799%
Difference+7+132.7786+3.3891%+480000+129964850+1.1475+3.3849%+133.9261+4.3709%+4.3709%

Known prime factors (1 factor, 94.0 bits, 0.00263046% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3573761198946922757907945861575784812994.0062783439110196624030840
23 × 33 × 5 × 13 × 198250648874403421
2021-05-21271982506488744034211.720e+91.645e+93.072e+9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-09T04:57:00Carsten Kossendeyleela20000245000---0.005--0.604%
2011-12-23T12:48:00Squeeky_SquirrelP4_2600850001572500---0.025--1.610%
2016-04-06T15:35:15harleeP4_260017500046812506---0.064--2.446%
2017-05-13T15:56:56Jocelyn Larouchelow 4M35000035000006---0.079--2.562%
2022-02-25T17:22:59Jocelyn LaroucheManual testing200000200000---0.030--0.862%
2022-05-17T01:12:24Jocelyn LaroucheManual testing500000130364850---1.154--5.363%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:33Mark RoseManual testing21260--0.043--
2009-03-15T08:10:00S485122USB-A260261--0.043--
2011-06-19T07:16:00markroldgamer261262--0.086--
2012-07-02T04:03:00GrunwalderGIMPManual testing21263--0.447--
2016-02-23T16:29:33Mark RoseManual testing262263--0.275--
2015-01-30T19:16:00VictordeHollanderManual testing263264--0.549--
2015-01-30T19:16:00VictordeHollanderManual testing264265--1.046--
2016-02-26T10:03:26ramgeisManual testing265266--2.091--
2017-01-20T05:22:17Gordon SpenceManual testing266267--4.182--
2018-11-19T15:52:44TJAOIManual testing267268--8.364--
2020-12-21T22:31:05axnManual testing268269--16.73--
2021-03-18T11:36:12-Anonymous-Manual testing269270--33.46--
2021-03-18T11:36:12-Anonymous-Manual testing270271--66.91--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.608 GHz-days
Estimated T-Level:0.850
DigitsB1CurvesCompleteFacMiss
201100017 / 1000.17084.294%
255000017 / 2800.06194.099%

New Calculation Method

Total ECM effort:2.608 GHz-days
Estimated T-Level:0.850
DigitsB1CompleteFacMiss
20110000.56057.149%
25500000.05195.070%
302500000.00399.689%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.776
50000635000050.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-07T00:00:00ANONYMOUSv4_computersB1664161D0590B__0.375


PRP results:
dateuseridcompidcofactorsres64PRP
2021-05-21T16:22:50GURA LOVE
19894692275790794586157578481
860BBC401F637673no


P-1 factor-bounds graph:
B1 = 500000, B2 = 130364850 (P-1 stage 2)
B1 = 350000, B2 = 3500000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 175000, B2 = 4681250 (P-1 stage 2)
B1 = 350000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
B1 = 85000, B2 = 1572500 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 20000, B2 = 245000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-17T01:12:24+00:00