is 2 1473049 - 1
has 443432 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LEBA2F6BF5D4C2188double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.171768.6567%2500000625000000.31947.4188%20.491170.9820%2.3253%
PrimeNet2560.006562.5000%70001200000.00072.9129%0.007263.5923%1.0923%
GPU722600.104365.0000%65001000000.00061.4477%0.104965.5067%0.5067%
Difference+7+20.0674+3.6567%+2493500+62400000+0.3187+5.9711%+20.3862+5.4753%+5.4753%

Known prime factors (1 factor, 92.3 bits, 0.00626376% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
147304959635834579841690962876204632892.2682024231189181136912719
32 × 61 × 1753 × 2103322422224027
2016-08-2917532103322422224027881,168,8306,344,17511,849,153

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.962%
2010-10-22T12:26:00Rob_Deetwopc100000200000---0.006--1.219%
2010-10-23T12:03:00Rob_Deetwopc200000300000---0.011--1.523%
2010-10-24T12:38:00Rob_Deetwopc2000001000000---0.013--2.338%
2010-10-25T12:11:00Rob_Deetwopc2000002000000---0.017--2.826%
2010-10-26T10:37:00Rob_Deetwopc2000003000000---0.020--3.118%
2010-10-27T12:30:00Rob_Deetwopc2000004000000---0.023--3.328%
2010-10-28T11:32:00Rob_Deetwopc2000005000000---0.026--3.492%
2014-11-19T23:20:00Jocelyn LaroucheManual testing243572243572---0.013--1.388%
2015-01-26T12:23:00Jocelyn LaroucheManual testing294721294721---0.016--1.521%
2015-01-28T21:36:00Jocelyn LaroucheManual testing324193324193---0.018--1.591%
2015-01-31T14:55:00Jocelyn LaroucheManual testing356612356612---0.020--1.663%
2015-02-15T21:12:00Jocelyn LaroucheManual testing392273392273---0.022--1.736%
2015-02-20T16:56:00Jocelyn LaroucheManual testing431500431500---0.024--1.811%
2015-02-26T14:18:00alpertronManual testing200000060000000---0.286--7.241%
2016-08-25T05:08:26Bruno Victal5820K-factoring25000006250000012---0.319--7.419%
2016-08-27T10:54:04Bruno VictalManual testing25000006250000012---0.319--7.419%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2016-02-23T16:28:34Mark RoseManual testing258260--0.078--
2010-05-08T14:20:00Architects Cubedm1_tt260261--0.104--
2016-02-23T16:28:34Mark RoseManual testing261262--0.209--
2011-04-05T20:59:00GrunwalderGIMPManual testing21263--1.083--
2016-02-23T16:28:34Mark RoseManual testing262263--0.666--
2015-04-03T01:54:00snme2pm1Manual testing263264--1.333--
2015-04-03T01:54:00snme2pm1Manual testing264265--2.536--
2015-09-21T11:27:00ramgeisManual testing265266--5.073--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.607 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.607 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024811.77
50000500000030.142
250000350000005013.69


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-14T00:00:00ANONYMOUSv4_computersEBA2F6BF5D4C21880.056
2015-07-04T19:27:00MadPooManual testingEBA2F6BF5D4C21880.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T05:04:47Oliver KruseGTX-1
5963583457984169096287620463
774DF2EDD77AA1__no
2017-11-05T01:01:03kkmrkkblmbrbkc4.xlarge
5963583457984169096287620463
774DF2EDD77AA1__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 431500 (P-1 stage 1)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 392273 (P-1 stage 1)
B1 = 356612 (P-1 stage 1)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 324193 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 294721 (P-1 stage 1)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 243572 (P-1 stage 1)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-28T11:14:16+00:00