is 2 3280229 - 1
has 987448 decimal digits
takes 0.345 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPA8B3823EBF40C2E0verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27072.845768.5714%40000001500000001.82067.4949%74.666370.9270%2.3555%
PrimeNet2600.046863.3333%140002600000.00422.7755%0.051064.3510%1.0177%
GPU722641.085165.6250%170002800000.00481.6873%1.089966.2050%0.5800%
Difference+6+71.7606+2.9464%+3983000+149720000+1.8158+5.8076%+73.5764+4.7219%+4.7219%

Known prime factors (1 factor, 92.7 bits, 0.00282561% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
328022979688029742779453817668080492892.6861214671746130825832856
23 × 32 × 3670763219 × 4595894617
2022-01-2236707632194595894617459,042,279566.701,137.7

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-09T04:56:00Carsten Kossendeydurandal15000191250---0.004--0.572%
2011-09-21T10:40:00harleeP4_2600600001065000---0.017--1.496%
2013-09-06T09:36:00Squeeky_SquirrelP4_26001150002616250---0.038--2.181%
2017-01-12T03:13:44Jocelyn Larouchelow 4M138000138000---0.021--0.788%
2017-01-21T04:21:45Squeeky_SquirrelP4_2600205000589375012---0.078--2.926%
2017-01-30T01:30:44Jocelyn Larouchelow 4M165600165600---0.025--0.875%
2017-02-04T18:42:55Jocelyn Larouchelow 4M198720198720---0.030--0.967%
2018-08-06T19:37:28Jocelyn Larouchelow 4M410000820000---0.066--1.861%
2018-08-07T17:09:29Jocelyn Larouchelow 4M4100001230000---0.069--2.140%
2018-08-08T12:55:43Jocelyn Larouchelow 4M4100001640000---0.073--2.340%
2018-08-08T23:04:23Jocelyn Larouchelow 4M4100002050000---0.076--2.496%
2018-08-11T22:24:53Jocelyn Larouchelow 4M4100004100000---0.093--2.991%
2021-02-13T13:46:12mikrMSI400000015000000012---1.821--7.495%
2022-03-24T08:46:58Jocelyn LaroucheManual testing1000000134316000---1.258--6.428%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:25Mark RoseManual testing21260--0.047--
2009-04-03T10:31:00S485122USB-A260261--0.047--
2011-10-02T20:15:00markroldgamer261262--0.094--
2012-11-25T15:11:00lycornManual testing262265--2.037--
2015-06-29T20:47:00ThaManual testing265266--2.278--
2017-04-05T22:02:30Gordon SpenceManual testing266267--4.556--
2018-12-03T19:08:42TJAOIManual testing267268--9.112--
2021-08-02T18:24:31MadPooManual testing268269--18.22--
2022-01-17T12:09:39TJAOIManual testing269270--36.45--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.644 GHz-days
Estimated T-Level:3.550
DigitsB1CurvesCompleteFacMiss
201100071 / 1000.71048.989%
255000071 / 2800.25477.567%

New Calculation Method

Total ECM effort:10.644 GHz-days
Estimated T-Level:3.550
DigitsB1CompleteFacMiss
20110002.3309.729%
25500000.21081.042%
302500000.01398.712%


ECM Summary

B1B2factorcurvesGHz-days
500005000000507.280
50000500000071.019
50000655000071.161
50000680000071.184


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-06T00:00:00ANONYMOUSv4_computersD459077A6BB15A__0.345


PRP results:
dateuseridcompidcofactorsres64PRP
2022-01-29T08:09:18LaurVdebi
7968802974277945381766808049
A8B3823EBF40C2E0no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 1000000, B2 = 134316000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 410000, B2 = 4100000 (P-1 stage 2)
B1 = 205000, B2 = 5893750 (P-1 stage 2)
B1 = 410000, B2 = 2050000 (P-1 stage 2)
B1 = 410000, B2 = 1640000 (P-1 stage 2)
B1 = 410000, B2 = 1230000 (P-1 stage 2)
B1 = 410000, B2 = 820000 (P-1 stage 2)
B1 = 410000 (P-1 stage 1)
B1 = 115000, B2 = 2616250 (P-1 stage 2)
B1 = 205000 (P-1 stage 1)
B1 = 198720 (P-1 stage 1)
B1 = 165600 (P-1 stage 1)
B1 = 138000 (P-1 stage 1)
B1 = 115000 (P-1 stage 1)
B1 = 60000, B2 = 1065000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 15000, B2 = 191250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-24T08:46:58+00:00