is 2 1991153 - 1
has 599397 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-LE5D9138784810829double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.923068.6567%1000000300000000.24606.2504%15.168970.6158%1.9591%
PrimeNet2580.019363.7931%80001400000.00142.4767%0.020764.6898%0.8967%
GPU722620.308566.1290%80001100000.00131.2355%0.309866.5475%0.4185%
Difference+5+14.6144+2.5277%+992000+29890000+0.2447+5.0149%+14.8591+4.0683%+4.0683%

Known prime factors (1 factor, 80.0 bits, 0.00401807% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
199115312139701100516952331577512580.006304840991639440875
3 × 53 × 812909311038509
2017-06-15125812909311038509196,8444,222,4547,886,369

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-21T20:41:00kurlykurlytop100000030000000---0.246--6.250%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:02Mark RoseManual testing258260--0.058--
2009-12-11T12:47:00S485122USB-W260261--0.077--
2016-02-23T16:29:02Mark RoseManual testing261262--0.154--
2011-07-01T19:07:00GrunwalderGIMPManual testing21263--0.802--
2016-02-23T16:29:02Mark RoseManual testing262263--0.493--
2015-03-06T09:37:00lycornManual testing263264--0.986--
2015-03-06T09:37:00lycornManual testing264265--1.876--
2015-09-12T12:52:00ramgeisManual testing265266--3.753--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.241 GHz-days
Estimated T-Level:1.900
DigitsB1CurvesCompleteFacMiss
201100038 / 1000.38068.255%
255000038 / 2800.13687.288%

New Calculation Method

Total ECM effort:3.241 GHz-days
Estimated T-Level:1.900
DigitsB1CompleteFacMiss
20110001.23329.132%
25500000.11189.502%
302500000.00799.319%


ECM Summary

B1B2factorcurvesGHz-days
500005000000302.536
50000500000010.085
50000560000070.620


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00ANONYMOUSv4_computersE5D91387848108290.131
2015-07-03T04:32:00MadPooManual testingE5D91387848108290.131


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:09:14alpertronManual testing
1213970110051695233157751
908B2D6F6B8B9D__no
2017-10-20T16:14:14Oliver KruseThreadripper
1213970110051695233157751
908B2D6F6B8B9D__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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101
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TF factor-bounds graph:
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2100
Last modified: 2022-03-26T22:01:32+00:00