is 2 62439281 - 1
has 18796097 decimal digits
takes 146.674 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27330.635364.3836%585000109687503.91964.1733%34.554965.8699%1.4864%
PrimeNet2703.826962.8571%260000120000003.06435.1471%6.891264.7689%1.9118%
GPU7227461.273464.8649%400000130000003.70073.7251%64.974166.1737%1.3088%
Difference-1-30.6381-0.4813%+185000-2031250+0.2189+0.4482%-30.4193-0.3038%-0.3038%

Known prime factors (1 factor, 78.6 bits, 0.00012594% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
624392814691455016933211706295292478.6343756813773154444
22 × 34 × 227 × 18743 × 2725271
2013-04-091874327252711,405.70.56610.9446

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-04-09T14:07:00Jwb52zClay585000109687502478.6343.920293.37.8394.173%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-06T00:00:00ANONYMOUSv4_computers21259--0.001--
2022-03-30T01:48:47LordJuliusManual testing21263--0.026--
2008-12-24T01:36:00DerekDerek_Desk263264--0.031--
2009-02-17T10:28:00ANONYMOUS3matsch1264265--0.060--
2009-02-18T12:58:00jkolonkoWEGA2265266--0.120--
2009-02-23T07:45:00Dirk-HROgrey266267--0.239--
2009-02-26T10:30:00Dirk-HROgrey267268--0.479--
2009-10-05T09:16:00subgeniussbs2008x64268269--0.957--
2012-04-20T13:31:00Johan ViljoenL1269270--1.915--
2012-11-04T16:24:00TDH-DXLnorthstar270271--3.830--
2013-03-27T10:26:00BdotManual testing271272--7.660--
2013-03-28T10:25:00BdotManual testing272273--15.32--


ECM factoring results:
No ECM results for M62439281


Lucas-Lehmer results:
No L-L results for M62439281


PRP results:
No PRP results for M62439281


P-1 factor-bounds graph:
B1 = 585000, B2 = 10968750 (P-1 stage 2)
B1 = 585000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2022-03-30T01:48:47+00:00