is 2 5350843 - 1
has 1610765 decimal digits
takes 0.845 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDAD98686F6621524double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.553165.6716%5000050000000.07323.2024%5.626366.7710%1.0993%
PrimeNet2620.114862.9032%220005500000.01163.0874%0.126464.0485%1.1453%
GPU722662.760065.1515%320006000000.01442.0297%2.774465.8589%0.7073%
Difference+1+2.7931+0.5201%+18000+4400000+0.0588+1.1727%+2.8519+0.9121%+0.9121%

Known prime factors (1 factor, 77.6 bits, 0.00145067% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
53508432327506622304544195297672477.62321748971351846281
119497993 × 182002817
2015-01-221194979931820028179,634.128.14255.688

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-23T18:36:00Carsten Kossendeyleela25000343750---0.010--1.421%
2010-09-20T19:49:00Squeeky_SquirrelP4_260060000960000---0.025--2.320%
unknown500005000000---0.073--3.202%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-05-16T00:00:00ANONYMOUSv4_computers21261--0.057--
1998-05-23T00:00:00ANONYMOUSv4_computers21262--0.115--
2009-05-23T21:23:00GrunwalderGIMPManual testing262263--0.183--
2014-12-23T20:05:00VictordeHollanderManual testing263264--0.367--
2014-12-23T20:05:00VictordeHollanderManual testing264265--0.698--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.720 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.720 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.720


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-29T00:00:00ANONYMOUSv4_computersDAD98686F66215240.845
2000-06-28T00:00:00ANONYMOUSv4_computersDAD98686F66215240.845


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-28T07:35:02kkmrkkblmbrbkc4.xlarge
232750662230454419529767
43CF7C239423FA__no
2018-06-15T02:23:16ATHec2-PRPCFDC
232750662230454419529767
43CF7C239423FA__no


P-1 factor-bounds graph:
B1 = 50000, B2 = 5000000 (P-1 stage 2)
B1 = 60000, B2 = 960000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 25000, B2 = 343750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
108
109
103
104
105
106
107
108
109
TF factor-bounds graph:
267
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-06-15T02:23:16+00:00