is 2 2119463 - 1
has 638022 decimal digits
takes 0.139 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L332BAC2D904C19BEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.019667.1642%14000030100000.02833.1025%14.047868.1829%1.0187%
PrimeNet2580.018162.0690%90001600000.00162.6824%0.019863.0864%1.0175%
GPU722620.289964.5161%100001400000.00161.4540%0.291565.0321%0.5159%
Difference+5+13.7297+2.6481%+130000+2870000+0.0266+1.6485%+13.7563+3.1508%+3.1508%

Known prime factors (1 factor, 76.3 bits, 0.00360230% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2119463962667632165953696227432376.34922710177817823517
3 × 7 × 1217 × 888608906281
2016-06-03121788860890628113,0304,615.78,620.8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-07-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.277%
2009-08-02T19:43:00harleeP4_260020000260000---0.003--1.022%
2010-12-30T22:21:00Jocelyn LaroucheManual testing3000030000---0.003--0.416%
2011-01-11T22:55:00Jocelyn LaroucheManual testing5000050000---0.005--0.597%
2011-01-25T14:46:00James Heinrichi7-9201400003010000---0.028--3.103%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-17T00:00:00ANONYMOUSv4_computers21258--0.018--
2016-02-23T16:29:05Mark RoseManual testing258260--0.054--
2009-01-03T07:01:00Sturle Sundegiovanni.ifi260261--0.072--
2012-04-02T05:47:00Sebastian HornbostelManual testing261262--0.145--
2013-09-06T08:31:00ramgeisManual testing262263--0.463--
2015-03-15T12:13:00VictordeHollanderManual testing263264--0.926--
2015-03-15T12:13:00VictordeHollanderManual testing264265--1.763--
2016-01-06T22:34:25ramgeisManual testing265266--3.526--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.045 GHz-days
Estimated T-Level:1.200
DigitsB1CurvesCompleteFacMiss
201100024 / 1000.24078.568%
255000024 / 2800.08691.772%

New Calculation Method

Total ECM effort:2.045 GHz-days
Estimated T-Level:1.200
DigitsB1CompleteFacMiss
20110000.77446.108%
25500000.07093.242%
302500000.00499.570%


ECM Summary

B1B2factorcurvesGHz-days
500005000000211.789
50000500000030.256


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07T00:00:00ANONYMOUSv4_computers332BAC2D904C19BE0.139


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-07T15:11:53kkmrkkblmbrbkc4.xlarge
96266763216595369622743
2629FA15036713__no
2017-10-21T15:04:48Oliver KruseGTX-1
96266763216595369622743
2629FA15036713__no


P-1 factor-bounds graph:
B1 = 140000, B2 = 3010000 (P-1 stage 2)
B1 = 140000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 20000, B2 = 260000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2017-10-21T15:04:48+00:00