is 2 3347887 - 1
has 1007815 decimal digits
takes 0.352 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9190F9C782964B97double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26817.803767.6471%14695761116423001.13797.7643%18.941770.1590%2.5120%
PrimeNet2600.045963.3333%140002600000.00422.7856%0.050064.3547%1.0214%
GPU722641.063265.6250%180003000000.00511.7552%1.068266.2283%0.6033%
Difference+4+16.7406+2.0221%+1451576+111342300+1.1328+6.0091%+17.8734+3.9307%+3.9307%

Known prime factors (2 factors, 127.4 bits, 0.00380639% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3347887109699260273754443592063.2501638335766317
16903 × 96925739
2014-09-0716903969257390.61600.80661.5020
3347887209496706636364687292064.1843128789989572
22 × 3 × 13 × 20056346087
2017-08-0813200563460871.5878166.41310.81

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
334788722981633747796949645019880829398294971139127.434
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-05T05:41:00Carsten Kossendeydurandal15000206250---0.004--0.809%
2011-10-10T12:18:00harleeP4_260055000907500---0.015--1.828%
2012-12-15T04:08:00Squeeky_SquirrelP4_26002300006670000---0.088--3.804%
2021-03-10T11:45:15Jocelyn LaroucheManual testing33478836826756---0.079--3.519%
2021-03-10T15:34:12Jocelyn LaroucheManual testing33478870305626---0.107--4.055%
2022-01-06T11:34:16Jocelyn LaroucheManual testing1469576111642300-
skipped known factor: 10969926027375444359
--1.138--7.764%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-27T18:50:00S485122USB-Z260261--0.046--
2011-08-23T13:42:00markroldgamer261262--0.092--
2022-04-22T15:56:51LordJuliusManual testing21262--0.184--
2012-11-15T00:20:00GrunwalderGIMPManual testing21263--0.477--
2022-04-22T15:56:52LordJuliusManual testing262263--0.293--
2022-04-22T15:56:52LordJuliusManual testing26326463.250200.1390.7140.283
2017-08-08T11:29:01TJAOIManual testing264265*64.184200.5250.7141.066
2022-04-22T15:56:52LordJuliusManual testing26426564.184200.5250.7141.066
2022-04-22T15:56:52LordJuliusManual testing265266--2.232--
2022-04-22T15:56:52LordJuliusManual testing266267--4.464--
2021-10-20T10:52:34Jocelyn LaroucheManual testing267268--8.928--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.315 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.315 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.877
50000500000030.438


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-04T00:00:00ANONYMOUSv4_computers9190F9C782964B970.352


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:09:58alpertronManual testing
10969926027375444359
20949670663636468729
3F1C66E3AC75CC__no
2017-11-20T10:54:47Oliver KruseGTX-3
10969926027375444359
20949670663636468729
3F1C66E3AC75CC__no


P-1 factor-bounds graph:
B1 = 1469576, B2 = 111642300 (P-1 stage 2)
B1 = 1469576 (P-1 stage 1)
B1 = 334788, B2 = 7030562 (P-1 stage 2)
B1 = 230000, B2 = 6670000 (P-1 stage 2)
B1 = 334788, B2 = 3682675 (P-1 stage 2)
B1 = 334788 (P-1 stage 1)
B1 = 230000 (P-1 stage 1)
B1 = 55000, B2 = 907500 (P-1 stage 2)
B1 = 55000 (P-1 stage 1)
B1 = 15000, B2 = 206250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-22T15:56:52+00:00