is 2 6606191 - 1
has 1988662 decimal digits
takes 1.238 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB24C4A78D715C787double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.497965.6716%8000013400000.04042.7537%4.538366.6170%0.9453%
PrimeNet2630.241663.4921%280007000000.01763.1362%0.259264.6370%1.1449%
GPU722674.497965.6716%400008000000.02212.0958%4.520066.3911%0.7195%
Difference---+40000+540000+0.0183+0.6579%+0.0183+0.2259%+0.2259%

Known prime factors (1 factor, 75.3 bits, 0.00114052% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6606191479733091788369229262892375.3453630935676764184
23 × 3 × 101 × 1497910757741
2017-01-0210114979107577411,645.722,18041,425

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-06-23T00:00:00barryhv4_computers30000307500---0.012--1.500%
2012-07-03T18:57:00NesowaLaptop800001340000---0.040--2.754%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-29T00:00:00ANONYMOUSv4_computers21261--0.046--
1998-07-29T00:00:00ANONYMOUSv4_computers21262--0.093--
1999-12-15T00:00:00ANONYMOUSv4_computers21263--0.242--
2014-06-29T01:13:00NesowaManual testing263264--0.297--
2014-07-07T20:17:00lycornManual testing264265--0.566--
2015-11-04T20:31:47snme2pm1Manual testing265266--1.131--
2016-03-29T12:12:59Gordon SpenceManual testing266267--2.262--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.710 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:1.710 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.19482.403%
25500000.01798.266%
302500000.00199.892%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.855
50000500000030.855


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00schazv4_computers3D8FA2D68D5971__1.238
2000-07-25T00:00:00ANONYMOUSv4_computersB24C4A78D715C7871.238
2001-07-29T00:00:00barryhv4_computersB24C4A78D715C7871.238


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-27T19:25:05pewdesktop
47973309178836922926289
AC9B8A3C73428A__no
2018-11-05T08:28:51Oliver KruseGTX-2
47973309178836922926289
AC9B8A3C73428A__no


P-1 factor-bounds graph:
B1 = 80000, B2 = 1340000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 30000, B2 = 307500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-11-05T08:28:51+00:00