is 2 1430321 - 1
has 430570 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBD5DFD2DE12CB38Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.774368.6567%2500000625000000.31947.3965%21.093770.9750%2.3183%
PrimeNet2560.006762.5000%65001100000.00072.7737%0.007463.5401%1.0401%
GPU722600.107465.0000%6000800000.00061.3037%0.107965.4563%0.4563%
Difference+7+20.6669+3.6567%+2494000+62420000+0.3188+6.0928%+20.9857+5.5187%+5.5187%

Known prime factors (1 factor, 73.2 bits, 0.00511834% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1430321109144368804539760394392373.2093815380212013239
3 × 1271793404004413
2016-07-21312717934040044131,522.33,836,0657,164,700

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.836%
2009-08-07T16:11:00markrlounge2000005000000---0.026--3.478%
2014-11-10T23:29:00Jocelyn LaroucheManual testing244874244874---0.014--1.385%
2015-01-30T21:42:00Jocelyn LaroucheManual testing404042404042---0.022--1.751%
2015-02-20T16:56:00Jocelyn LaroucheManual testing444446444446---0.025--1.827%
2015-03-01T03:15:00Jocelyn LaroucheManual testing488890488890---0.027--1.904%
2015-03-05T14:27:00Jocelyn LaroucheManual testing537779537779---0.030--1.983%
2015-03-12T10:39:00Jocelyn LaroucheManual testing591556591556---0.033--2.064%
2015-03-26T11:43:00alpertronManual testing200000060000000---0.286--7.219%
2016-08-27T10:53:43Bruno VictalManual testing25000006250000012---0.319--7.396%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--
2016-02-23T16:28:31Mark RoseManual testing258260--0.081--
2009-02-18T02:10:00Sturle Sundegobi.ifi260261--0.107--
2016-02-23T16:28:31Mark RoseManual testing261262--0.215--
2011-05-07T23:53:00GrunwalderGIMPManual testing21263--1.116--
2016-02-23T16:28:31Mark RoseManual testing262263--0.686--
2015-03-20T04:02:00snme2pm1Manual testing263264--1.373--
2015-03-20T04:02:00snme2pm1Manual testing264265--2.612--
2015-10-02T08:43:15ramgeisManual testing265266--5.225--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.466 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:25.466 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.81
50000500000010.047
250000350000005013.61


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-13T16:44:24MadPooManual testingBD5DFD2DE12CB38A0.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T21:50:53Oliver KruseGTX-2
10914436880453976039439
1F0491309B624F__no
2017-10-26T20:43:16kkmrkkblmbrbkc4.xlarge
10914436880453976039439
1F0491309B624F__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 = 591556 (P-1 stage 1)
B1 = 537779 (P-1 stage 1)
B1 = 488890 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 444446 (P-1 stage 1)
B1 = 404042 (P-1 stage 1)
B1 = 244874 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-07T10:30:26+00:00