is 2 6906323 - 1
has 2079011 decimal digits
takes 1.506 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC15E6D10864872F8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272138.472268.0556 %35000009616446840166.703011.2924 %305.175271.6628 %
Target2674.302465.6716 %4500045000000.09102.2356 %4.393466.4391 %
Difference+5+134.1698+2.3839 %+3455000+9611946840+166.6120+9.0568%+300.7818+5.2238 %

Known prime factors:
No known factors for M6906323

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-06-09Roman MaznichenkoWorkShop8500015725006--0.0522.912%
2019-05-08takahashivaio30000050000006--0.1764.527%
2021-05-12takahashivaio10000003000000012--0.8167.167%
2023-06-26ThaZ-17035000009616446840--199.615.790%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-24ANONYMOUSv4_computers212610.022
1998-08-30ANONYMOUSv4_computers212620.044
2005-07-01David Campeauv4_computers212630.142
2014-02-09NesowaManual testing2632640.284
2014-02-18lycornManual testing2642650.541
2015-06-21VictordeHollanderManual testing2652661.082
2016-04-01Gordon SpenceManual testing2662672.164
2018-02-27ANONYMOUSManual testing2672684.328
2019-12-02mnd9Manual testing2682698.656
2020-12-20takahashiManual testing26927017.31
2021-08-10SRBaseManual testing27027134.62
2021-09-25SRBaseManual testing27127269.25


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-09W. Oleinikv4_computersC15E6D10864872F81.506
2000-05-31W. Oleinikv4_computersC15E6D10864872F81.506
2000-07-03W. Oleinikv4_computersC15E6D10864872F81.506
2000-07-25W. Oleinikv4_computersC15E6D10864872F81.506
2000-08-10W. Oleinikv4_computersC15E6D10864872F81.506
2002-01-22Luehav4_computersC15E6D10864872F81.506


PRP results:
No PRP results for M6906323


CERT results:
No CERT results for M6906323


P-1 factor-bounds graph:
B1 = 3500000, B2 = 9616446840 (P-1 stage 2)
B1 = 3500000 (P-1 stage 1)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000, B2 = 5000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 85000, B2 = 1572500 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
261
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2024-03-13T02:15:48+00:00