is 2 6926567 - 1
has 2085105 decimal digits
takes 1.510 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAB5A0441C9F2122Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272138.067568.0556 %40000004143239108.33317.9720 %146.400670.6022 %
Target2674.289865.6716 %4500045000000.09102.2366 %4.380866.4394 %
Difference+5+133.7776+2.3839 %+3955000+409823910+8.2421+5.7354%+142.0198+4.1627 %

Known prime factors:
No known factors for M6926567

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-12-01WillametteMathv4_computers30000232500--0.0131.386%
2002-04-20shaneamyv4_computers35000542500--0.0201.848%
2012-08-16NesowaEPC8500015087506--0.0512.885%
2018-03-16Squeeky_Squirreli5-5250U_16004050001225125012--0.3325.590%
2021-06-02Dylan DelgadoManual testing6300001890000012--0.4786.338%
2021-11-29Seth_TrManual testing400000011000000012--3.0919.707%
2021-12-02Seth_TrManual testing4000000414323910--9.9811.594%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-05Amperiov4_computers212620.044
2005-02-18David Campeauv4_computers212630.142
2014-02-09NesowaManual testing2632640.283
2014-02-17lycornManual testing2642650.539
2015-06-26VictordeHollanderManual testing2652661.079
2016-04-03Gordon SpenceManual testing2662672.158
2018-05-23ramgeisManual testing2672684.315
2020-05-01TJAOIManual testing2682698.631
2021-07-22takahashiManual testing26927017.26
2021-08-11SRBaseManual testing27027134.52
2021-10-13SRBaseManual testing27127269.05


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_computersAB5A0441C9F2122D1.510
2002-03-03WillametteMathv4_computers68B03AF2DD6B6B4B1.510
2002-04-28shaneamyv4_computersAB5A0441C9F2122D1.510


PRP results:
No PRP results for M6926567


CERT results:
No CERT results for M6926567


P-1 factor-bounds graph:
B1 = 4000000, B2 = 414323910 (P-1 stage 2)
B1 = 4000000, B2 = 110000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 405000, B2 = 12251250 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
B1 = 405000 (P-1 stage 1)
B1 = 85000, B2 = 1508750 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 35000, B2 = 542500 (P-1 stage 2)
B1 = 30000, B2 = 232500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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105
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109
TF factor-bounds graph:
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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