is 2 6599861 - 1
has 1986757 decimal digits
takes 1.237 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA698ECA0F76286CCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.502265.6716%8000013400000.04042.7533%4.542666.6168%0.9452%
PrimeNet2630.241863.4921%280007000000.01763.1357%0.259464.6368%1.1448%
GPU722674.502265.6716%400008000000.02212.0955%4.524366.3910%0.7193%
Difference---+40000+540000+0.0183+0.6579%+0.0183+0.2258%+0.2258%

Known prime factors (1 factor, 67.1 bits, 0.00101669% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
65998611581887234474778944872167.10011984246596063
7 × 31 × 47 × 353 × 3328729
2016-12-2935333287297.72060.04940.0921

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-21T19:19:00Carsten Kossendeyleela35000516250---0.017--1.808%
2012-11-19T18:07:00NesowaLaptop800001340000---0.040--2.753%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-20T00:00:00ANONYMOUSv4_computers21261--0.047--
1998-09-20T00:00:00ANONYMOUSv4_computers21262--0.093--
2003-06-23T00:00:00ANONYMOUSv4_computers21263--0.242--
2014-07-05T18:51:00thelegendarymudkipi5-4670k263264--0.297--
2014-07-07T20:16:00lycornManual testing264265--0.566--
2015-11-03T20:08:21snme2pm1Manual testing265266--1.132--
2016-05-13T12:12:55Gordon SpenceManual testing266267--2.265--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.425 GHz-days
Estimated T-Level:0.250
DigitsB1CurvesCompleteFacMiss
20110005 / 1000.05095.099%
25500005 / 2800.01898.227%

New Calculation Method

Total ECM effort:1.425 GHz-days
Estimated T-Level:0.250
DigitsB1CompleteFacMiss
20110000.19282.505%
25500000.01898.236%
302500000.00199.888%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.855
50000500000020.570


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersA698ECA0F76286CC1.237
2001-04-21T00:00:00ANONYMOUSv4_computersA698ECA0F76286CC1.237


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-29T17:27:30Oliver KruseGTX-3
158188723447477894487
2420D51D9C778E__no
2018-11-03T15:56:41oodairacom1
158188723447477894487
2420D51D9C778E__no


P-1 factor-bounds graph:
B1 = 80000, B2 = 1340000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 35000, B2 = 516250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-11-03T15:56:41+00:00