is 2 4718443 - 1
has 1420393 decimal digits
takes 0.621 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF4884F857959EE78double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271101.321267.6056%80000004000000005.60488.7198%106.926070.4304%2.8247%
PrimeNet2610.065162.2951%200004000000.00783.1240%0.072963.4730%1.1779%
GPU722651.546264.6154%300006000000.01172.2342%1.557965.4059%0.7906%
Difference+6+99.7750+2.9902%+7970000+399400000+5.5931+6.4856%+105.3681+5.0244%+5.0244%

Known prime factors:
No known factors for M4718443

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-08-10T00:00:00ANONYMOUSv4_computers2000020000---0.004--0.180%
2010-05-22T10:02:00markrtiny950002113750---0.039--1.862%
2017-01-31T09:06:13Squeeky_Squirreli5-5250U_1600290000870000012---0.143--3.178%
2017-02-02T16:43:31Ismo Laitela6600K19882036163430312---1.000--5.833%
2021-09-02T07:51:08axnManual testing8000000400000000---5.605--8.720%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:38:58Mark RoseManual testing21261--0.065--
2010-06-17T21:14:00markrManual testing261262--0.065--
2011-10-25T19:39:00GrunwalderGIMPManual testing21263--0.338--
2016-02-23T16:38:58Mark RoseManual testing262263--0.208--
2015-01-11T14:02:00VictordeHollanderManual testing263264--0.416--
2015-01-11T14:02:00VictordeHollanderManual testing264265--0.792--
2015-07-12T21:28:00snme2pm1Manual testing265266--1.584--
2018-02-25T07:56:53YxinityManual testing266267--3.167--
2018-02-25T07:56:53YxinityManual testing267268--6.335--
2018-02-25T07:56:53YxinityManual testing268269--12.67--
2018-02-25T07:56:53YxinityManual testing269270--25.34--
2021-01-26T19:39:24-Anonymous-Manual testing270271--50.68--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.266 GHz-days
Estimated T-Level:0.800
DigitsB1CurvesCompleteFacMiss
201100016 / 1000.16085.146%
255000016 / 2800.05794.436%

New Calculation Method

Total ECM effort:3.266 GHz-days
Estimated T-Level:0.800
DigitsB1CompleteFacMiss
20110000.62653.464%
25500000.05894.378%
302500000.00499.635%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.776
50000580641071.490


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-09-23T00:00:00ANONYMOUSv4_computersF4884F857959EE780.621


PRP results:
No PRP results for M4718443


P-1 factor-bounds graph:
B1 = 8000000, B2 = 400000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1988203, B2 = 61634303 (P-1 stage 2)
B1 = 1988203 (P-1 stage 1)
B1 = 290000, B2 = 8700000 (P-1 stage 2)
B1 = 290000 (P-1 stage 1)
B1 = 95000, B2 = 2113750 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-17T08:56:33+00:00