is 2 1997903 - 1
has 601429 decimal digits
takes 0.131 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LBEDED9B3BEB67F7Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270119.600770.0000%1000000300000000.24604.7522%119.846771.4257%1.4257%
PrimeNet2580.019263.7931%80001400000.00142.4783%0.020764.6904%0.8973%
GPU722620.307566.1290%80001100000.00131.2364%0.308866.5478%0.4188%
Difference+8+119.2932+3.8710%+992000+29890000+0.2447+3.5158%+119.5379+4.8779%+1.0069%

Known prime factors (1 factor, 67.7 bits, 0.00339063% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19979032467208656522823654172167.74161744955999436
22 × 32 × 1715137666651
2014-02-019171513766665126.6478,908.916,639

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-03-05T15:11:00kurlyhex100000030000000---0.246--4.752%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27T00:00:00ANONYMOUSv4_computers21258--0.019--
2009-04-19T19:29:00Rob_Deetwopc260261--0.077--
2011-05-03T04:17:00XyzzyManual testing21262--0.308--
2011-05-03T04:17:00XyzzyManual testing262263--0.491--
2011-05-03T04:17:00XyzzyManual testing263264--0.983--
2011-05-03T04:17:00XyzzyManual testing264265--1.870--
2014-01-04T17:33:00Never Odd Or EvenManual testing265266--3.740--
2014-01-04T17:33:00Never Odd Or EvenManual testing266267--7.481--
2014-02-01T17:02:00ANONYMOUSManual testing2526867.7412126.650.26754.13
2014-01-04T17:33:00Never Odd Or EvenManual testing267268--14.96--
2014-01-04T17:33:00Never Odd Or EvenManual testing268269--29.92--
2014-01-04T17:33:00Never Odd Or EvenManual testing269270--59.84--


ECM factoring results:
Total ECM effort:26.924 GHz-days
Estimated T-Level:25.337
DigitsB1CompleteFacMiss
201100011.2050.001%
25500001.05834.698%
302500000.06793.476%
3510000000.00399.683%


ECM Summary

B1B2factorcurvesGHz-days
500005000000403.383
50000700000070.688
50000707097870.691
50000750000021822.16


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00ANONYMOUSv4_computersBEDED9B3BEB67F7C0.131


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T18:02:52Oliver KruseGTX-0
246720865652282365417
ADDEC992880927__no
2017-11-13T03:35:44kkmrkkblmbrbkc4.xlarge
246720865652282365417
ADDEC992880927__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-10-31T12:29:51+00:00