is 2 4903631 - 1
has 1476141 decimal digits
takes 0.680 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L92A5C413C61A7B16double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273390.087368.4932%1200000397500000.66334.2959%390.750769.8467%1.3535%
PrimeNet2610.062662.2951%220004500000.00913.3025%0.071863.5403%1.2452%
GPU722651.487864.6154%320007000000.01372.3743%1.501665.4555%0.8401%
Difference+8+388.5995+3.8778%+1168000+39050000+0.6496+1.9216%+389.2491+4.3911%+4.3911%

Known prime factors:
No known factors for M4903631

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-31T08:02:00Carsten Kossendeydurandal30000435000---0.010--0.661%
2011-07-10T21:03:00Squeeky_SquirrelT7500_220060000960000---0.022--1.044%
2014-09-09T05:55:00mikrMSI120000039750000---0.663--4.296%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:04Mark RoseManual testing21261--0.063--
2010-04-10T00:46:00markrManual testing261262--0.063--
2011-09-03T15:11:00GrunwalderGIMPManual testing21263--0.325--
2016-02-23T16:39:04Mark RoseManual testing262263--0.200--
2014-12-29T19:38:00VictordeHollanderManual testing263264--0.400--
2014-12-29T19:38:00VictordeHollanderManual testing264265--0.762--
2015-07-24T22:13:00snme2pm1Manual testing265266--1.524--
2017-10-31T15:30:48YxinityManual testing266267--3.048--
2018-05-23T15:00:47ramgeisManual testing267268--6.096--
2021-04-05T09:35:52TJAOIManual testing268269--12.19--
2021-04-23T21:07:10-Anonymous-Manual testing269270--24.38--
2021-04-24T23:59:10-Anonymous-Manual testing270271--48.77--
2021-04-26T20:37:09-Anonymous-Manual testing271272--97.53--
2021-04-27T14:55:25-Anonymous-Manual testing272273--195.1--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.888 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.888 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.888


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-04-19T00:00:00ANONYMOUSv4_computers92A5C413C61A7B160.680


PRP results:
No PRP results for M4903631


P-1 factor-bounds graph:
B1 = 1200000, B2 = 39750000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 60000, B2 = 960000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 30000, B2 = 435000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-04-27T14:55:25+00:00