is 2 7079707 - 1
has 2131205 decimal digits
takes 1.544 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA779186AC8BE0C4Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273270.186968.4932%50000001250000003.64816.2685%273.835070.4682%1.9750%
PrimeNet2630.225463.4921%300008000000.02273.3196%0.248264.7040%1.2119%
GPU722674.197165.6716%4500010000000.03072.3041%4.227766.4626%0.7910%
Difference+6+265.9899+2.8215%+4955000+124000000+3.6174+3.9644%+269.6073+4.0056%+4.0056%

Known prime factors (1 factor, 99.6 bits, 0.00140614% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
70797079283192232776282966404472310873099.55165561980409473746345749
7 × 23 × 592 × 19181 × 732209 × 8329441
2016-03-2073220983294412.702e+100.36240.4712

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-08T00:00:00ANONYMOUSv4_computers2500093750---0.009--0.381%
2002-08-10T00:00:00ANONYMOUSv4_computers35000533750---0.020--0.797%
2011-12-30T16:35:00bcp19Manual testing850001551250---0.052--1.393%
2014-08-17T13:42:00Nesowanewfs2500003812500---0.140--2.193%
2016-03-20T13:05:30mikrS0525000000125000000123099.5513.6483.0887.2966.269%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-01T00:00:00ANONYMOUSv4_computers21262--0.087--
1998-06-20T00:00:00ANONYMOUSv4_computers21262--0.087--
2005-07-01T00:00:00ANONYMOUSv4_computers21263--0.225--
2012-02-19T13:10:00Never Odd Or EvenManual testing263264--0.277--
2012-02-19T13:10:00Never Odd Or EvenManual testing264265--0.528--
2012-02-19T13:10:00Never Odd Or EvenManual testing265266--1.056--
2012-03-14T12:20:00Never Odd Or EvenManual testing266267--2.111--
2012-03-14T12:20:00Never Odd Or EvenManual testing267268--4.222--
2013-03-10T21:02:00Never Odd Or EvenManual testing268269--8.444--
2013-03-10T21:02:00Never Odd Or EvenManual testing269270--16.89--
2013-03-13T01:14:00Never Odd Or EvenManual testing270271--33.78--
2013-07-02T17:39:00Never Odd Or EvenManual testing271272--67.55--
2013-07-02T17:39:00Never Odd Or EvenManual testing272273--135.1--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.995 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.995 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.995


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00Joel Armengaudv4_computersA779186AC8BE0C4C1.544
2002-08-10T00:00:00ANONYMOUSv4_computersA779186AC8BE0C4C1.544


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-05T13:53:54-p95holder- @bopoh13t_i3-2100
928319223277628296640447231087
B7383E9E40D671__no
2019-03-11T15:03:04kkmrkkblmbrbkc5.large
928319223277628296640447231087
B7383E9E40D67196no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 125000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 250000, B2 = 3812500 (P-1 stage 2)
B1 = 250000 (P-1 stage 1)
B1 = 85000, B2 = 1551250 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 35000, B2 = 533750 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
B1 = 25000, B2 = 93750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2019-03-11T15:03:04+00:00