is 2 75143623 - 1
has 22620485 decimal digits
takes 207.750 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L20AFB9F95CCA2A__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275101.830464.0000%635000111125004.83403.5564%106.664465.2803%1.2803%
PrimeNet2703.179961.4286%320000140000004.27075.5587%7.450663.5726%2.1441%
GPU7227450.914063.5135%500000180000005.82664.1840%56.740665.0401%1.5266%
Difference+1+50.9164+0.4865%+135000-6887500-0.9926-0.6275%+49.9238+0.2402%+0.2402%

Known prime factors:
No known factors for M75143623

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-12-08T08:24:10LaurVdebilis63500011112500---4.834--3.556%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-06T00:00:00Marzbugv4_computers21263--0.021--
2004-04-20T00:00:00Marzbugv4_computers21263--0.021--
2004-11-22T00:00:00Marzbugv4_computers21265--0.097--
2004-12-23T00:00:00Marzbugv4_computers21265--0.097--
2005-01-10T00:00:00Marzbugv4_computers21265--0.097--
2010-08-03T16:27:00chargerSL263.1800.18265266--0.099--
2010-08-11T18:49:00chargerSL263.1800.18266267--0.199--
2010-08-24T15:45:00dtlgcDuron600ShipOld267268--0.398--
2010-09-04T02:58:00PrimeCruncherApollo8268269--0.796--
2012-12-04T23:52:00Choi4KANGmantoman94269270--1.591--
2014-03-15T15:36:00SMoffatManual testing270271--3.182--
2015-08-31T03:45:00Judge HaleManual testing271272--6.365--
2015-11-30T06:20:061997rj7Manual testing272273--12.73--
2015-11-30T06:20:061997rj7Manual testing273274--25.46--
2015-12-04T06:34:16endless_mikeManual testing274275--50.92--


ECM factoring results:
No ECM results for M75143623


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-11-04T23:26:39curtiscgrn016--10l20AFB9F95CCA2A__207.7


PRP results:
No PRP results for M75143623


P-1 factor-bounds graph:
B1 = 635000, B2 = 11112500 (P-1 stage 2)
B1 = 635000 (P-1 stage 1)
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108
TF factor-bounds graph:
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Last modified: 2016-11-04T23:26:39+00:00