is 2 6439469 - 1
has 1938474 decimal digits
takes 1.207 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF086BF383AC0FD91double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.614365.6716%16500036300000.09613.8747%4.710567.0018%1.3301%
PrimeNet2620.095462.9032%280006500000.01683.4841%0.112264.1957%1.2925%
GPU722662.293465.1515%4500010000000.02642.5752%2.319866.0489%0.8974%
Difference+1+2.3209+0.5201%+120000+2630000+0.0698+1.2995%+2.3907+0.9528%+0.9528%

Known prime factors (1 factor, 72.7 bits, 0.00112974% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
643946979395240677422620470712272.750616473506413515
3 × 5 × 41098233760901
2016-10-30541098233760901152.85608,5421,136,587

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16T00:00:00ANONYMOUSv4_computers2500025000---0.007--0.463%
2011-08-31T06:51:00markrtiny1650003630000---0.096--3.875%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11T00:00:00ANONYMOUSv4_computers21262--0.095--
2016-02-23T16:39:24Mark RoseManual testing262263--0.152--
2014-08-02T07:16:00NesowaManual testing263264--0.305--
2014-08-05T06:50:00lycornManual testing264265--0.580--
2015-10-24T21:43:21snme2pm1Manual testing265266--1.160--
2016-04-03T19:18:39Gordon SpenceManual testing266267--2.321--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.140 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:1.140 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.12987.895%
25500000.01298.841%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.855
50000500000010.285


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computersF086BF383AC0FD911.207
2001-10-06T00:00:00ANONYMOUSv4_computersF086BF383AC0FD911.207


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-16T10:51:30Chun sung soojeong-woon_Jo
7939524067742262047071
7C185A3B961F79__no
2018-07-15T11:17:01kkmrkkblmbrbkc5.large
7939524067742262047071
7C185A3B961F79__no


P-1 factor-bounds graph:
B1 = 165000, B2 = 3630000 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
B1 = 25000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2018-07-15T11:17:01+00:00