is 2 449287 - 1
has 135249 decimal digits
takes 0.005 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
Actualunknown30000001000000000.141543.3117%0.141543.3117%43.3117%
PrimeNet2400.000052.5000%45001500000.000218.3536%0.000261.2180%8.7180%
GPU722440.000056.8182%80002400000.000413.6485%0.000462.7118%5.8937%
Difference-440.0000-56.8182%+2992000+99760000+0.1411+29.6632%+0.1411-19.4001%-19.4001%

Known prime factors (2 factors, 145.0 bits, 0.03226771% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4492871570709194076711547.158174800205
32 × 5 × 172 × 13441
-289134416.436e-51.717e-52.336e-5
4492872790040445126605260184037002393097.816310496458291315491009537
32 × 3673 × 11743 × 450581 × 1775175427
2020-07-1545058117751754271.326e+111.65903.0849

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4492874382342179006235378725490941198890452113336944144.975
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T18:48:17alpertronManual testing300000010000000012-
skipped known factor: 157070919407671
--0.141--34.802%


Trial Factoring results:
No TF results for M449287


ECM factoring results:

Old Calculation Method

Total ECM effort:21.135 GHz-days
Estimated T-Level:27.125
DigitsB1CurvesCompleteFacMiss
2011000553 / 1005.5300.386%
2550000553 / 2801.97513.827%
30250000272 / 6400.42565.355%

New Calculation Method

Total ECM effort:21.135 GHz-days
Estimated T-Level:27.125
DigitsB1CompleteFacMiss
201100031.7310.000%
25500004.0961.663%
302500000.40466.754%
3510000000.03296.876%
4030000000.00299.795%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002813.619
250000250000001449.273
250000250000001288.243


Lucas-Lehmer results:
No L-L results for M449287


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-24T19:59:07Oliver KruseDoppelherz
157070919407671
EC12325577A92B__no
2017-09-27T07:33:35Oliver KruseManual testing
157070919407671
EC12325577A92B__no
2017-11-07T05:52:16kkmrkkblmbrbkc4.xlarge
157070919407671
EC12325577A92B__no
2020-04-18T19:12:31Oliver KruseAddPrpType5
157070919407671
E6EDF343E7BC96__no
2020-07-17T06:18:31kotenok2000shodan1
157070919407671
279004044512660526018403700239
E6EDF343E7BC96D2no
2020-07-17T14:34:58Klaus Nordmannno1
157070919407671
279004044512660526018403700239
E6EDF343E7BC96D2no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
240
250
260
270
280
290
2100
Last modified: 2020-07-27T10:56:49+00:00