is 2 1842523 - 1
has 554655 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE98D811CFEEB9CFCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.349669.1176%18425231842523000.92678.0275%33.276371.5967%2.4791%
PrimeNet2570.010463.1579%80001500000.00122.8828%0.011764.2200%1.0621%
GPU722610.166765.5738%90001400000.00131.5968%0.168066.1235%0.5497%
Difference+7+32.1829+3.5439%+1833523+184112300+0.9254+6.4307%+33.1083+5.4732%+5.4732%

Known prime factors:
No known factors for M1842523

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:29:00Carsten Kossendeyleela1000001700000---0.015--2.220%
2014-05-19T21:01:00Jocelyn LaroucheManual testing134835134835---0.011--0.925%
2014-09-23T20:52:00Jocelyn LaroucheManual testing169670169670---0.013--1.050%
2015-07-12T02:52:00mikrMSI278000091760000---0.600--7.495%
2018-08-06T14:03:30Jocelyn Larouchelow 4M184252318425230012---0.927--8.028%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:54Mark RoseManual testing258260--0.063--
2010-04-09T12:50:00Architects CubedManual testing260261--0.083--
2016-02-23T16:28:54Mark RoseManual testing261262--0.167--
2011-01-21T16:11:00GrunwalderGIMPManual testing21263--0.866--
2016-02-23T16:28:54Mark RoseManual testing262263--0.533--
2015-04-27T21:09:00snme2pm1Manual testing263264--1.066--
2015-04-27T21:09:00snme2pm1Manual testing264265--2.028--
2015-09-06T20:47:00ramgeisManual testing265266--4.056--
2017-12-04T13:35:48TJAOIManual testing266267--8.111--
2019-06-24T09:36:01TJAOIManual testing267268--16.22--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.078 GHz-days
Estimated T-Level:24.929
DigitsB1CurvesCompleteFacMiss
2011000276 / 1002.7606.242%
2550000276 / 2800.98637.251%

New Calculation Method

Total ECM effort:19.078 GHz-days
Estimated T-Level:24.929
DigitsB1CompleteFacMiss
201100010.6150.002%
25500000.98237.448%
302500000.06293.993%
3510000000.00399.711%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027619.08


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computersE98D811CFEEB9CFC0.100
2015-06-27T00:56:00MadPooManual testingE98D811CFEEB9CFC0.100


PRP results:
No PRP results for M1842523


P-1 factor-bounds graph:
B1 = 1842523, B2 = 184252300 (P-1 stage 2)
B1 = 2780000, B2 = 91760000 (P-1 stage 2)
B1 = 2780000 (P-1 stage 1)
B1 = 1842523 (P-1 stage 1)
B1 = 100000, B2 = 1700000 (P-1 stage 2)
B1 = 169670 (P-1 stage 1)
B1 = 134835 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-06-01T01:45:13+00:00