is 2 6993823 - 1
has 2105351 decimal digits
takes 1.525 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5CB5742D4E96FE26double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272136.739868.0556 %35000009616446840166.703011.3045 %303.442771.6667 %
Target2674.248665.6716 %4500045000000.09102.2402 %4.339666.4407 %
Difference+5+132.4912+2.3839 %+3455000+9611946840+166.6120+9.0643%+299.1032+5.2260 %

Known prime factors:
No known factors for M6993823

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-11-03ANONYMOUSv4_computers35000297500--0.0161.556%
2011-11-30James HeinrichQ660013500028350006--0.0893.604%
2020-02-04takahashivaio6000001200000012--0.3865.811%
2023-07-19takahashivaio250000050176980--1.6918.367%
2023-09-25ThaManual testing35000009616446840--199.615.805%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-09-20ANONYMOUSv4_computers212620.044
2005-09-22David Campeauv4_computers212630.140
2014-02-09NesowaManual testing2632640.281
2014-02-14lycornManual testing2642650.534
2015-07-03VictordeHollanderManual testing2652661.068
2016-04-27Gordon SpenceManual testing2662672.137
2018-02-27ANONYMOUSManual testing2672684.274
2020-04-03TJAOIManual testing2682698.548
2020-07-26takahashiManual testing26927017.10
2020-09-16takahashiManual testing27027134.19
2021-09-30SRBaseManual testing27127268.38


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)
1999-03-26ANONYMOUSv4_computers5CB5742D4E96FE261.525
2001-11-24ANONYMOUSv4_computers5CB5742D4E96FE261.525


PRP results:
No PRP results for M6993823


CERT results:
No CERT results for M6993823


P-1 factor-bounds graph:
B1 = 3500000, B2 = 9616446840 (P-1 stage 2)
B1 = 2500000, B2 = 50176980 (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 = 135000, B2 = 2835000 (P-1 stage 2)
B1 = 135000 (P-1 stage 1)
B1 = 35000, B2 = 297500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
103
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105
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105
106
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109
1010
TF factor-bounds graph:
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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