is 2 68952557 - 1
has 20756788 decimal digits
takes 184.352 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
Actual27455.485563.5135%615000110700004.59243.8626%60.077964.9228%1.4093%
PrimeNet2703.465461.4286%300000130000003.84555.3852%7.310963.5057%2.0772%
GPU7227455.485563.5135%450000150000004.81773.9425%60.303264.9520%1.4385%
Difference---+165000-3930000-0.2253-0.0799%-0.2253-0.0292%-0.0292%

Known prime factors (1 factor, 93.1 bits, 0.00013506% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
68952557108307227996226372769158752012993.12978537499339021156800
26 × 33 × 52 × 19 × 3931 × 24967 × 974923
2013-12-142496797492351,760,5880.29740.3846

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-12-14T02:39:00Jwb52zClay615000110700002993.1294.592368.79.1853.863%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-05-13T00:00:00Jocelyn Larouchev4_computers21256--0.000--
2004-05-11T00:00:00mdrgv4_computers21261--0.004--
2008-04-07T00:00:00lycornv4_computers21263--0.023--
2009-02-02T04:37:001997rj7Manual testing21264--0.052--
2010-04-13T14:51:00GIMP Philippines1818Shop264265--0.054--
2010-04-14T19:38:00ANONYMOUSDual_Quad_Opteron265266--0.108--
2010-04-19T15:16:00lindedDFSM6GJ1-SH135266267--0.217--
2010-04-20T15:00:00TeraTismS267268--0.434--
2010-04-25T12:14:00StephanSmars268269--0.867--
2012-03-17T19:30:00NoWhereMan1065Tverizon269270--1.734--
2012-09-26T18:00:00Bold_SeekerManual testing270271--3.468--
2013-12-02T12:50:00gcardonaManual testing271272--6.936--
2013-12-02T12:50:00gcardonaManual testing272273--13.87--
2013-12-07T22:39:00Jerry HallettManual testing273274--27.74--


ECM factoring results:
No ECM results for M68952557


Lucas-Lehmer results:
No L-L results for M68952557


PRP results:
No PRP results for M68952557


P-1 factor-bounds graph:
B1 = 615000, B2 = 11070000 (P-1 stage 2)
B1 = 615000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2013-12-14T02:39:41+00:00