is 2 2932679 - 1
has 882825 decimal digits
takes 0.250 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L70F15F96D48116E1double-checked
PRPEE614B4B42F4E7ECverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26820.324467.6471%1000000200000000.25125.5400%20.575569.4394%1.7924%
PrimeNet2590.026262.7119%130002600000.00333.0704%0.029563.8568%1.1449%
GPU722630.544265.0794%170003000000.00401.9455%0.548265.7587%0.6794%
Difference+5+19.7802+2.5677%+983000+19700000+0.2472+3.5945%+20.0273+3.6807%+3.6807%

Known prime factors (1 factor, 70.4 bits, 0.00240187% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
293267916005433767069938321512270.439272880764772925
52 × 17 × 571 × 1124470031
2020-10-05571112447003197.8047.560814.121

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.246%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.145%
2010-11-09T16:44:00markrtiny1050002283750---0.028--2.584%
2015-04-29T15:00:00VictordeHollanderManual testing100000020000000---0.251--5.540%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-21T00:00:00ANONYMOUSv4_computers21259--0.026--
2016-02-23T16:29:24Mark RoseManual testing259260--0.026--
2009-02-13T05:23:00Sturle Sundegolli.ifi260261--0.052--
2011-12-19T07:19:00Sebastian HornbostelManual testing261262--0.105--
2013-01-07T13:49:00dbaughManual testing262263--0.335--
2015-04-25T17:16:00VictordeHollanderManual testing263264--0.669--
2015-04-25T17:16:00VictordeHollanderManual testing264265--1.274--
2016-02-23T09:49:05ramgeisManual testing265266--2.548--
2017-11-23T20:18:51Gordon SpenceManual testing266267--5.096--
2018-12-20T02:16:15chuenkitManual testing267268--10.19--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.239 GHz-days
Estimated T-Level:1.400
DigitsB1CurvesCompleteFacMiss
201100028 / 1000.28075.472%
255000028 / 2800.10090.468%

New Calculation Method

Total ECM effort:3.239 GHz-days
Estimated T-Level:1.400
DigitsB1CompleteFacMiss
20110000.90340.526%
25500000.08292.161%
302500000.00599.499%


ECM Summary

B1B2factorcurvesGHz-days
500005000000252.892
50000500000030.347


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-16T00:00:00ANONYMOUSv4_computers70F15F96D48116E10.250
1999-05-09T00:00:00ANONYMOUSv4_computers70F15F96D48116E10.250
2018-10-08T08:47:34kkmrkkblmbrbkold70F15F96D48116E10.250


PRP results:
dateuseridcompidcofactorsres64PRP
2020-10-07T19:06:23LordJuliusBlackboxNouveau
1600543376706993832151
EE614B4B42F4E7ECno


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 2283750 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2020-10-07T19:06:23+00:00