is 2 394987 - 1
has 118903 decimal digits
takes 0.004 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L27AA9F3BE31E8E46double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26775.227671.6418%100000002000000000.28618.6071%75.513774.0826%2.4408%
PrimeNet2400.000052.5000%40001200000.000117.2746%0.000160.7054%8.2054%
GPU722440.000056.8182%70002000000.000212.8256%0.000362.3565%5.5383%
Difference+23+75.2276+14.8236%+9993000+199800000+0.2858-4.2185%+75.5134+11.7261%+11.7261%

Known prime factors (1 factor, 96.8 bits, 0.02449551% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3949871336209452795736340914646479673096.754169146003893259314979309
3 × 7 × 5167 × 116533541 × 13376824907
2015-11-03116533541133768249075.706e+1011.79419.134

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-06-23T00:00:00ANONYMOUSv4_computers1000004000000---0.004--2.409%
2002-06-15T00:00:00ANONYMOUSv4_computers327683276800---0.003--1.686%
2002-08-24T00:00:00ANONYMOUSv4_computers655366553600---0.006--2.403%
2012-07-20T11:25:00alpertronManual testing10000000200000000---0.286--8.607%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-01T00:00:00ANONYMOUSv4_computers252253--0.002--
2000-04-27T00:00:00ANONYMOUSv4_computers21254--0.006--
2022-03-07T06:43:19LordJuliusManual testing254255--0.006--
2001-03-17T00:00:00ANONYMOUSv4_computers21256--0.024--
2002-01-22T00:00:00ANONYMOUSv4_computers21257--0.049--
2004-01-18T00:00:00ANONYMOUSv4_computers21258--0.097--
2009-01-05T21:49:00Sturle Sundeinteravia.ifi258259--0.097--
2009-01-27T19:20:00Sturle Sundeginara.ifi259260--0.194--
2011-11-12T09:56:00lycornasteroid260261--0.389--
2015-08-25T13:23:00NRManual testing261262--0.778--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.527 GHz-days
Estimated T-Level:26.125
DigitsB1CurvesCompleteFacMiss
2011000424 / 1004.2401.410%
2550000424 / 2801.51421.937%
30250000144 / 6400.22579.838%

New Calculation Method

Total ECM effort:10.527 GHz-days
Estimated T-Level:26.125
DigitsB1CompleteFacMiss
201100021.0320.000%
25500002.5517.798%
302500000.23878.858%
3510000000.01898.228%
4030000000.00199.887%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002802.947
250000250000001417.421
2500002500000030.158


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-12-22T00:00:00ANONYMOUSv4_computers27AA9F3BE31E8E460.004


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23T08:21:17Oliver KruseDoppelherz
133620945279573634091464647967
6DF517715145BE__no
2017-09-24T17:46:37Oliver KruseManual testing
133620945279573634091464647967
6DF517715145BE__no
2017-11-07T00:14:06kkmrkkblmbrbkc4.xlarge
133620945279573634091464647967
6DF517715145BE__no
2020-04-18T16:01:13Oliver KruseAddPrpType5
133620945279573634091464647967
09B51D3122F742__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 100000, B2 = 4000000 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
103
104
105
106
107
108
109
103
104
105
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109
1010
1011
TF factor-bounds graph:
267
262
261
260
259
258
257
256
255
254
253
250
260
270
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2100
Last modified: 2022-03-07T06:43:19+00:00