is 2 7340779 - 1
has 2209795 decimal digits
takes 1.601 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3663EC1596106195double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.047865.6716 %22500057375000.16614.5266 %4.213967.2255 %
Target2674.047865.6716 %5000055000000.10972.4289 %4.157566.5054 %
Difference---+175000+237500+0.0564+2.0977%+0.0564+0.7201 %

Known prime factors (1 factor, 67.1 bits, 0.00091390% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
73407791568184507282850237192167.08810681322154521
17 × 628313067913
2017-12-31176283130679134.047810,82420,215

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-01-02ANONYMOUSv4_computers35000367500--0.0171.672%
2002-08-24Sturle Sundev4_computers3500035000--0.0110.605%
2012-09-12NesowaEPC8000013800006--0.0482.818%
2016-09-18Squeeky_SquirrelP4_2600225000573750012--0.1664.527%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-11ANONYMOUSv4_computers212610.021
1998-08-02ANONYMOUSv4_computers212620.042
1999-01-17ANONYMOUSv4_computers212630.134
2012-04-05David CampeauManual testing2632640.267
2013-11-20David CampeauManual testing2642650.509
2015-06-21VictordeHollanderManual testing2652661.018
2016-10-06Gordon SpenceManual testing2662672.036


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
50000500000030.995
50000500000030.995


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16ANONYMOUSv4_computers3663EC15961061951.601
2003-02-24Sturle Sundev4_computers3663EC15961061951.601


PRP results:
dateuseridcompidcofactorsres64
2018-03-06Oliver KruseGTX-4
156818450728285023719
CBF1BE58C59E4F93
2019-05-14krackerGRID-11
156818450728285023719
CBF1BE58C59E4F93


CERT results:
No CERT results for M7340779


P-1 factor-bounds graph:
B1 = 225000, B2 = 5737500 (P-1 stage 2)
B1 = 225000 (P-1 stage 1)
B1 = 80000, B2 = 1380000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 35000, B2 = 367500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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106
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109
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TF factor-bounds graph:
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266
265
264
263
262
261
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2024-02-09T03:30:02+00:00