is 2 6902219 - 1
has 2077775 decimal digits
takes 1.505 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L54ED019D7D00F7D2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.305065.6716%13000026650000.08483.5282%4.389866.8828%1.2112%
PrimeNet2630.231263.4921%280007000000.02043.1587%0.251764.6452%1.1532%
GPU722674.305065.6716%450009000000.02902.2353%4.333966.4390%0.7674%
Difference---+85000+1765000+0.0558+1.2929%+0.0558+0.4438%+0.4438%

Known prime factors (1 factor, 74.7 bits, 0.00108227% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6902219307022792751725797852812374.7012224087592350560
25 × 3 × 5 × 691 × 2347 × 2857061
2017-03-2923472857061842.250.04990.0919

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-24T00:00:00lettpv4_computers30000270000---0.014--1.452%
2011-11-19T09:18:00James Heinrichi7-9201300002665000---0.085--3.528%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21262--0.089--
2005-01-20T00:00:00ANONYMOUSv4_computers21263--0.231--
2014-02-09T10:09:00NesowaManual testing263264--0.284--
2014-02-17T23:33:00lycornManual testing264265--0.541--
2015-06-21T19:55:00VictordeHollanderManual testing265266--1.083--
2016-03-31T14:38:48Gordon SpenceManual testing266267--2.165--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.326 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:1.326 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.12987.895%
25500000.01298.841%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.995
50000500000010.332


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27T00:00:00ANONYMOUSv4_computers54ED019D7D00F7D21.505
2001-10-13T00:00:00lettpv4_computers54ED019D7D00F7D21.505


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-21T02:21:04Oliver KruseGTX-0
30702279275172579785281
13BA145A103A0B__no
2019-01-22T22:02:14ZeroDELL380
30702279275172579785281
13BA145A103A0B5Bno


P-1 factor-bounds graph:
B1 = 130000, B2 = 2665000 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 30000, B2 = 270000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
TF factor-bounds graph:
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2019-01-22T22:02:14+00:00