is 2 9419203 - 1
has 2835463 decimal digits
takes 2.603 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L1752B95B42D70FA2double-checked
PRP6840ABC878F219__
unverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.154664.1791%18000039150000.15374.1961%3.308365.6822%1.5031%
PrimeNet2640.377962.5000%4000011000000.03923.4960%0.417163.8110%1.3110%
GPU722686.328064.7059%6000014000000.05332.4606%6.381365.5743%0.8685%
Difference-1-3.1734-0.5268%+120000+2515000+0.1004+1.7355%-3.0730+0.1079%+0.1079%

Known prime factors (1 factor, 79.5 bits, 0.00084372% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
94192038382253862998439849586312479.47244495557973421105
3 × 5 × 701 × 4231627006507
2014-08-20701423162700650714,98292,396172,571

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-07-25T00:00:00ANONYMOUSv4_computers125000125000---0.050--1.357%
2011-07-17T04:47:00James HeinrichQ66001800003915000---0.154--4.196%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-02-07T00:00:00ANONYMOUSv4_computers21255--0.001--
1999-04-02T00:00:00ANONYMOUSv4_computers21264--0.378--
2013-09-02T12:44:00NesowaManual testing264265--0.397--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.420


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-09-23T00:00:00ANONYMOUSv4_computers1752B95B42D70FA22.603
2003-05-04T00:00:00ANONYMOUSv4_computers1752B95B42D70FA22.603


PRP results:
dateuseridcompidcofactorsres64PRP
2019-09-06T10:07:43Niels_Mache_NextcloudSuperDry-X
838225386299843984958631
6840ABC878F219__no
2020-11-26T10:39:51kutenshadar
838225386299843984958631
6840ABC878F21946no


P-1 factor-bounds graph:
B1 = 180000, B2 = 3915000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
B1 = 125000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
265
264
255
250
260
270
280
290
2100
Last modified: 2020-11-26T10:39:51+00:00