is 2 6943067 - 1
has 2090072 decimal digits
takes 1.514 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCB4FFC9965CD101Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.739468.0556 %35000009616446840166.703011.2975 %304.442471.6645 %
Target2674.279765.6716 %4500045000000.09102.2375 %4.370666.4397 %
Difference+5+133.4597+2.3839 %+3455000+9611946840+166.6120+9.0600%+300.0717+5.2247 %

Known prime factors:
No known factors for M6943067

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-09-10ANONYMOUSv4_computers35000341250--0.0161.620%
2011-11-28James HeinrichQ660013000028275006--0.0883.577%
2020-01-18takahashivaio6000001200000012--0.3865.806%
2023-07-03takahashivaio250000050350650--1.6158.366%
2023-08-18ThaZ-17035000009616446840--199.615.796%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-21ANONYMOUSv4_computers212620.044
2005-03-06David Campeauv4_computers212630.141
2014-02-09NesowaManual testing2632640.283
2014-02-16lycornManual testing2642650.538
2015-06-26VictordeHollanderManual testing2652661.076
2016-04-05Gordon SpenceManual testing2662672.153
2018-05-23ramgeisManual testing2672684.305
2020-04-24TJAOIManual testing2682698.610
2021-07-28takahashiManual testing26927017.22
2021-08-10SRBaseManual testing27027134.44
2021-09-26SRBaseManual testing27127268.88


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)
1999-09-07ANONYMOUSv4_computersCB4FFC9965CD101B1.514
2001-10-06ANONYMOUSv4_computersCB4FFC9965CD101B1.514


PRP results:
No PRP results for M6943067


CERT results:
No CERT results for M6943067


P-1 factor-bounds graph:
B1 = 3500000, B2 = 9616446840 (P-1 stage 2)
B1 = 2500000, B2 = 50350650 (P-1 stage 2)
B1 = 3500000 (P-1 stage 1)
B1 = 2500000 (P-1 stage 1)
B1 = 600000, B2 = 12000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 130000, B2 = 2827500 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 35000, B2 = 341250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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104
105
106
107
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105
106
107
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109
1010
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
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