is 2 55689527 - 1
has 16764219 decimal digits
takes 118.031 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9F2DE61EC3366636double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27468.699964.8649%870000210975006.06054.4502%74.760466.4285%1.5636%
PrimeNet2692.143862.3188%240000100000002.37175.3639%4.515564.3400%2.0212%
GPU7227334.348464.3836%360000120000003.05533.9363%37.403765.7855%1.4020%
Difference+1+34.3515+0.4813%+510000+9097500+3.0052+0.5139%+37.3567+0.6429%+0.6429%

Known prime factors:
No known factors for M55689527

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-10-28T23:57:00Jerry HallettP1Main87000021097500---6.060--4.450%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-15T00:00:00ANONYMOUSv4_computers21253--2.15467e-5--
2000-01-19T00:00:00ANONYMOUSv4_computers21253--2.15467e-5--
2000-03-01T00:00:00ANONYMOUSv4_computers21254--4.30933e-5--
2000-06-11T00:00:00ANONYMOUSv4_computers21256--0.000--
2001-09-30T00:00:00ANONYMOUSv4_computers21257--0.000--
2002-08-10T00:00:00ANONYMOUSv4_computers21258--0.001--
2008-09-14T23:25:00ANONYMOUSManual testing21264--0.064--
2009-01-05T04:24:00Arjen RodenhuisLaptop264265--0.067--
2009-03-30T00:35:00Sturle Sundegorky.ifi265266--0.134--
2009-04-02T09:19:00korvasapkd52233266267--0.268--
2009-06-01T23:31:00PiepenCC7CC774A267268--0.537--
2011-04-13T11:38:00ANONYMOUS268269--1.073--
2011-06-04T19:06:00steinrarManual testing269270--2.147--
2012-04-28T22:36:00XyzzyManual testing270271--4.294--
2012-04-28T22:36:00XyzzyManual testing271272--8.588--
2016-02-12T19:39:48ANONYMOUSManual testing272273--17.18--
2018-08-29T02:45:06ChuckManual testing273274--34.35--


ECM factoring results:
No ECM results for M55689527


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-10-09T02:12:00wuxiaoDNE_World_Trade9F2DE61EC3366636118.0
2021-04-11T11:33:17Milwizzle9F2DE61EC3366636118.0


PRP results:
No PRP results for M55689527


P-1 factor-bounds graph:
B1 = 870000, B2 = 21097500 (P-1 stage 2)
B1 = 870000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-04-11T11:33:17+00:00