is 2 1408499 - 1
has 424001 decimal digits
takes 0.054 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26721.096268.6567%500000150000000.07144.9108%21.167670.1959%1.5392%
PrimeNet2560.006862.5000%65001100000.00072.7654%0.007563.5370%1.0370%
GPU722600.109065.0000%6000700000.00051.2442%0.109665.4355%0.4355%
Difference+7+20.9871+3.6567%+494000+14930000+0.0709+3.6666%+21.0580+4.7605%+4.7605%

Known prime factors (4 factors, 253.6 bits, 0.01800776% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
140849910394722631029.953369
32 × 41
-9415.483e-115.948e-71.014e-6
14084992639858875468144274092167.83993711776702296
23 × 53 × 59 × 3746073581
2019-01-1159374607358124.20111.29921.104
14084992910683606243905679032167.980103325724982549
29 × 22453 × 158685077
2018-09-052245315868507728.4870.47980.8940
14084992822365310859857467439001432787.867100190533002148296429
3 × 71 × 18156377 × 25907045729
2019-01-11181563772590704572929,809,98379.093145.95

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
14084992744060079283507112998824565673097.792
14084993025574875059353566139865744893097.933
140849929337704566921945175362676309023360936117.820
14084997683793951622599685400963506845927885332741135.819
14084997450646115686802776323156613938288385801821948747155.706
14084998215012441151271821587370836076282338889291012947155.847
14084997987090687318856216926827598841552651301586176900150165.772
140849977447399786851206811393144247938499707360369305382
589081
56185.659
140849985392775727766668457135566151964152434321842356447
251927
56185.800
140849921686473504854411171657918480329435820889220102267
019005608831325761
68223.686
140849922542487690580556266135737984617559638252980292008
589676024221590974076867143
77253.639
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:13:55alpertronManual testing5000001500000012-
skipped known factor: 1039472263
--0.071--4.911%


Trial Factoring results:
No TF results for M1408499


ECM factoring results:

Old Calculation Method

Total ECM effort:25.536 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000304 / 1003.0404.711%
2550000304 / 2801.08633.700%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.536 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.3600.000%
25500001.36625.525%
302500000.11489.267%
3510000000.00899.234%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002029.51
50000500000090.424
50000500000020.094
500005000000411.931
250000350000005013.57


Lucas-Lehmer results:
No L-L results for M1408499


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T17:25:43Oliver KruseGTX-3
1039472263
BE758B91A3F21B__no
2017-10-26T03:54:30kkmrkkblmbrbkc4.xlarge
1039472263
BE758B91A3F21B__no
2018-09-05T16:38:26Oliver KruseGTX-1
1039472263
291068360624390567903
8D34F2BCB2F606__no
2018-09-05T16:58:22ATHec2-PRPCFDC
1039472263
291068360624390567903
8D34F2BCB2F606__no
2019-01-12T01:48:23Oliver KruseGTX-1
1039472263
263985887546814427409
291068360624390567903
282236531085985746743900143
8D34F2BCB2F606C8no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2021-12-28T11:10:23+00:00