is 2 78208159 - 1
has 23543002 decimal digits
takes 244.047 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
Actual27448.919063.5135%715000132275006.31974.1379%55.238765.0233%1.5098%
PrimeNet2716.112961.9718%320000160000005.31335.1913%11.426263.9460%1.9741%
GPU7227597.840364.0000%500000170000006.32993.7721%104.170265.3580%1.3580%
Difference-1-48.9213-0.4865%+215000-3772500-0.0102+0.3658%-48.9315-0.3347%-0.3347%

Known prime factors (1 factor, 82.3 bits, 0.00010524% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7820815959806441186005143607671292582.30738235423228671796
22 × 3 × 19 × 283 × 124769 × 4749391
2015-05-10124769474939120,5911.70462.1868

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-05-10T10:55:00Jwb52zClay715000132275002582.3076.320488.112.644.138%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2004-03-16T00:00:00AxelFoxv4_computers21262--0.008--
2008-05-21T00:00:001997rj7v4_computers21264--0.046--
2010-12-22T16:10:00ANONYMOUS264265--0.048--
2011-01-17T18:42:00ANONYMOUS265266--0.096--
2011-01-17T23:01:00sannerud.comJimEmcLap266267--0.191--
2011-01-18T03:33:00sannerud.comJimEmcLap267268--0.382--
2011-01-18T08:48:00sannerud.comJimEmcLap268269--0.764--
2011-01-19T23:21:00sannerud.comJimEmcLap269270--1.529--
2014-02-23T10:08:00PascalBieriManual testing270271--3.058--
2014-09-22T14:24:00NickOfTimeManual testing271272--6.115--
2014-09-22T14:24:00NickOfTimeManual testing272273--12.23--
2014-09-22T15:25:00NickOfTimeManual testing273274--24.46--


ECM factoring results:
No ECM results for M78208159


Lucas-Lehmer results:
No L-L results for M78208159


PRP results:
No PRP results for M78208159


P-1 factor-bounds graph:
B1 = 715000, B2 = 13227500 (P-1 stage 2)
B1 = 715000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2015-05-10T10:55:00+00:00