is 2 4811483 - 1
has 1448401 decimal digits
takes 0.634 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC30EF446E8F16FD2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27199.361967.6056%415000107900000.18713.5187%99.549168.7455%1.1399%
PrimeNet2610.063862.2951%200004500000.00833.2260%0.072163.5114%1.2164%
GPU722651.516364.6154%320006500000.01252.3231%1.528865.4374%0.8220%
Difference+6+97.8456+2.9902%+383000+10140000+0.1746+1.1956%+98.0202+3.3081%+3.3081%

Known prime factors:
No known factors for M4811483

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-03T20:26:00Carsten Kossendeydurandal30000412500---0.010--0.871%
2013-12-03T20:41:00David Campeaui5-2500k41500010790000---0.187--3.519%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:01Mark RoseManual testing21261--0.064--
2010-05-09T20:57:00markrManual testing261262--0.064--
2011-09-11T01:59:00GrunwalderGIMPManual testing21263--0.332--
2016-02-23T16:39:01Mark RoseManual testing262263--0.204--
2015-01-04T19:09:00VictordeHollanderManual testing263264--0.408--
2015-01-04T19:09:00VictordeHollanderManual testing264265--0.777--
2015-07-18T23:01:00snme2pm1Manual testing265266--1.553--
2017-11-12T10:00:11YxinityManual testing266267--3.106--
2018-05-08T11:46:20ramgeisManual testing267268--6.212--
2020-12-03T10:03:52-Anonymous-Manual testing268269--12.42--
2020-12-03T10:03:52-Anonymous-Manual testing269270--24.85--
2020-12-03T10:03:52-Anonymous-Manual testing270271--49.70--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.785 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.785 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.785


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-18T00:00:00ANONYMOUSv4_computersC30EF446E8F16FD20.634
2000-03-08T00:00:00ANONYMOUSv4_computersC30EF446E8F16FD20.634


PRP results:
No PRP results for M4811483


P-1 factor-bounds graph:
B1 = 415000, B2 = 10790000 (P-1 stage 2)
B1 = 415000 (P-1 stage 1)
B1 = 30000, B2 = 412500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2020-12-03T10:03:52+00:00