is 2 6951233 - 1
has 2092530 decimal digits
takes 1.516 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L726189829ADA9BFDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.577668.0556 %40000004568186709.06528.0816 %146.642770.6372 %
Target2674.274665.6716 %4500045000000.09102.2380 %4.365666.4399 %
Difference+5+133.3029+2.3839 %+3955000+452318670+8.9742+5.8437%+142.2771+4.1973 %

Known prime factors:
No known factors for M6951233

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-10-06ebravickv4_computers30000157500--0.0121.215%
2011-06-20Carsten Kossendeymother4450001335000012--0.3635.742%
2021-11-07Seth_TrManual testing20000005800000012--1.5978.433%
2021-12-03Seth_TrManual testing4000000456818670--10.8611.735%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-29ANONYMOUSv4_computers212620.044
2004-03-26Sturle Sundev4_computers212630.141
2014-02-09NesowaManual testing2632640.282
2014-02-16lycornManual testing2642650.538
2015-06-26VictordeHollanderManual testing2652661.075
2016-04-05Gordon SpenceManual testing2662672.150
2018-02-27ANONYMOUSManual testing2672684.300
2020-05-01TJAOIManual testing2682698.600
2021-07-31takahashiManual testing26927017.20
2021-08-11SRBaseManual testing27027134.40
2021-09-25SRBaseManual testing27127268.80


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)
1999-04-23ANONYMOUSv4_computers726189829ADA9BFD1.516
2001-11-17ebravickv4_computers726189829ADA9BFD1.516


PRP results:
No PRP results for M6951233


CERT results:
No CERT results for M6951233


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456818670 (P-1 stage 2)
B1 = 2000000, B2 = 58000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 445000, B2 = 13350000 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 30000, B2 = 157500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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105
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107
103
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105
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109
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