is 2 1079753 - 1
has 325039 decimal digits
takes 0.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L84225ECA93B3970Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271442.766470.4225%2500000625000000.24795.0968%443.014371.9300%1.5075%
PrimeNet2560.008962.5000%4500650000.00032.0196%0.009263.2574%0.7574%
GPU722600.142265.0000%4500200000.00020.6526%0.142565.2284%0.2284%
Difference+11+442.6241+5.4225%+2495500+62480000+0.2477+4.4442%+442.8718+6.7016%+6.7016%

Known prime factors (1 factor, 88.5 bits, 0.00819270% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10797534259885871042463640712573672788.461197262053036317733811
3 × 431 × 152561525936827327
2016-11-1843115256152593682732793,379,302357,218,575667,184,820

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-03T00:00:00Jocelyn Larouchev4_computers15000172500---0.001--0.368%
2012-01-04T01:31:00bcp19Toshiba-740Q20000010000000---0.032--2.485%
2012-03-23T05:01:00bcp19Toshiba-740Q200000100000000---0.242--3.737%
2014-08-21T02:33:00Jocelyn LaroucheManual testing259443259443---0.011--0.808%
2014-11-06T23:05:00Jocelyn LaroucheManual testing318886318886---0.014--0.904%
2016-05-13T14:57:50Jocelyn LaroucheManual testing9761845000000012---0.157--4.403%
2016-07-21T02:21:35Bruno Victal5820K-factoring25000006250000012---0.248--5.097%
2016-07-27T11:35:28Bruno VictalManual testing25000006250000012---0.248--5.097%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-24T00:00:00ANONYMOUSv4_computers21257--0.018--
2016-02-23T16:28:20Mark RoseManual testing257260--0.124--
2009-02-15T06:47:00Sturle Sundeczerny.ifi260261--0.142--
2010-11-15T21:25:00Michael CManual testing261262--0.284--
2012-10-18T21:47:00dbaughManual testing262263--0.909--
2014-01-01T22:06:00ramgeisManual testing263264--1.818--
2014-01-02T17:19:00lycornManual testing264265--3.460--
2014-02-22T13:29:00Never Odd Or EvenManual testing265266--6.921--
2014-02-22T13:29:00Never Odd Or EvenManual testing266267--13.84--
2014-02-22T13:29:00Never Odd Or EvenManual testing267268--27.68--
2014-02-22T13:29:00Never Odd Or EvenManual testing268269--55.37--
2014-02-22T13:29:00Never Odd Or EvenManual testing269270--110.7--
2014-04-01T16:48:00Never Odd Or EvenManual testing270271--221.5--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.591 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.591 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100012.7310.000%
25500001.34925.941%
302500000.10889.793%
3510000000.00799.295%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002789.76
50000500000030.105
25000025000000447.724


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-11T15:34:18MadPooManual testing84225ECA93B3970B0.032


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T23:27:48Oliver KruseGTX-0
425988587104246364071257367
DAD9F43223E3BD__no
2017-10-16T07:38:19Oliver KruseThreadripper
425988587104246364071257367
DAD9F43223E3BD__no
2018-01-02T05:22:33ATHec2-1xf
425988587104246364071257367
DAD9F43223E3BD__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 200000, B2 = 100000000 (P-1 stage 2)
B1 = 976184, B2 = 50000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 976184 (P-1 stage 1)
B1 = 200000, B2 = 10000000 (P-1 stage 2)
B1 = 318886 (P-1 stage 1)
B1 = 259443 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 15000, B2 = 172500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-08-07T11:04:23+00:00