is 2 6927793 - 1
has 2085474 decimal digits
takes 1.511 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAA3E40894D24550Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272138.043068.0556 %4200000404661411070.964210.5301 %209.007271.4193 %
Target2674.289165.6716 %4500045000000.09102.2367 %4.380166.4395 %
Difference+5+133.7540+2.3839 %+4155000+4042114110+70.8732+8.2934%+204.6271+4.9799 %

Known prime factors:
No known factors for M6927793

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-09-01ANONYMOUSv4_computers30000232500--0.0131.386%
2002-05-05ANONYMOUSv4_computers35000542500--0.0201.848%
2002-05-25ANONYMOUSv4_computers35000542500--0.0201.848%
2002-09-07ANONYMOUSv4_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%
2021-12-15Seth_TrManual testing2000000258849360--6.05510.412%
2023-11-21Sid & AndyPterodactyl42000004046614110--74.4714.815%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-11ANONYMOUSv4_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 testing2662672.157
2018-05-23ramgeisManual testing2672684.315
2020-05-01TJAOIManual testing2682698.629
2021-07-22takahashiManual testing26927017.26
2021-08-11SRBaseManual testing27027134.52
2021-09-25SRBaseManual testing27127269.03


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)
1999-03-15curtiscv4_computers2E3DC56998D537681.511
1999-05-30ANONYMOUSv4_computersAA3E40894D24550C1.511
2002-05-11ANONYMOUSv4_computersAA3E40894D24550C1.511
2002-05-25ANONYMOUSv4_computersAA3E40894D24550C1.511
2002-09-07ANONYMOUSv4_computersAA3E40894D24550C1.511


PRP results:
No PRP results for M6927793


CERT results:
No CERT results for M6927793


P-1 factor-bounds graph:
B1 = 4200000, B2 = 4046614110 (P-1 stage 2)
B1 = 2000000, B2 = 258849360 (P-1 stage 2)
B1 = 4200000 (P-1 stage 1)
B1 = 2000000 (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)
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
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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270
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Last modified: 2024-03-13T02:15:48+00:00