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-daysProbability
Actual270119.600770.0000%1000000300000000.24604.7522%119.846771.4257%
Target2620.307566.1290%80001100000.00131.2364%0.308866.5478%
Difference+8+119.2932+3.8710%+992000+29890000+0.2447+3.5158%+119.5379+4.8779%

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
2011-03-05kurlyhex100000030000000---0.246--4.752%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27ANONYMOUSv4_computers21258--0.019--
2009-04-19Rob_Deetwopc260261--0.077--
2011-05-03XyzzyManual testing21262--0.308--
2011-05-03XyzzyManual testing262263--0.491--
2011-05-03XyzzyManual testing263264--0.983--
2011-05-03XyzzyManual testing264265--1.870--
2014-01-04Never Odd Or EvenManual testing265266--3.740--
2014-01-04Never Odd Or EvenManual testing266267--7.481--
2014-01-04Never Odd Or EvenManual testing267268--14.96--
2014-02-01ANONYMOUSManual testing2526867.7412126.650.26453.56
2014-01-04Never Odd Or EvenManual testing268269--29.92--
2014-01-04Never 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)
1997-01-01Jeremy BuhlerBEDED9B3BEB67F7C0.131
1999-01-17ANONYMOUSv4_computersBEDED9B3BEB67F7C0.131


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05Oliver KruseGTX-0
246720865652282365417
ADDEC992880927__no
2017-11-13kkmrkkblmbrbkc4.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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100
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1010
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TF factor-bounds graph:
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265
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258
this exponent TF target: 62
TF double-checked to: 67.8
ECM T-Level=25.34 ~= 68-bit
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Last modified: 2023-04-26T21:34:10+00:00