is 2 62826031 - 1
has 18912520 decimal digits
takes 147.583 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L4DA2D52A7A6190__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27460.896264.8649%550000103125003.68513.7126%64.581366.1693%1.3044%
PrimeNet2703.803462.8571%260000120000003.06435.1510%6.867664.7704%1.9132%
GPU7227460.896264.8649%400000130000003.70073.7281%64.596966.1747%1.3099%
Difference---+150000-2687500-0.0157-0.0154%-0.0157-0.0054%-0.0054%

Known prime factors:
No known factors for M62826031

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-08-31T14:27:00LarryGDesktop255000010312500---3.685--3.713%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-13T00:00:00ANONYMOUSv4_computers21259--0.001--
2016-02-23T17:18:33Mark RoseManual testing259263--0.024--
2009-02-03T12:02:00Wojciech Florekarmada4263264--0.031--
2009-10-22T09:03:00ANONYMOUS8264265--0.059--
2009-10-25T15:47:00ANONYMOUS265266--0.119--
2009-12-28T05:02:00Sturle Sundegorro.ifi266267--0.238--
2009-12-30T02:34:00Sturle Sundegorro.ifi267268--0.476--
2010-01-01T03:31:00Sturle Sundegorro.ifi268269--0.952--
2011-12-14T23:40:00Robert Walkermach255269270--1.903--
2013-03-21T22:40:00Jerry HallettManual testing270271--3.806--
2013-03-21T22:40:00Jerry HallettManual testing271272--7.612--
2013-03-21T22:40:00Jerry HallettManual testing272273--15.22--
2013-08-16T16:58:00TheJudgerManual testing273274--30.45--


ECM factoring results:
No ECM results for M62826031


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-06-07T20:38:00curtiscwcm200--27l4DA2D52A7A6190__147.6


PRP results:
No PRP results for M62826031


P-1 factor-bounds graph:
B1 = 550000, B2 = 10312500 (P-1 stage 2)
B1 = 550000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2016-02-23T17:18:33+00:00