is 2 77998279 - 1
has 23479822 decimal digits
takes 243.393 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27598.103664.0000 %680000136000006.26183.7559 %104.365465.3521 %
Target27598.103664.0000 %5000008500000023.09323.7708 %121.196765.3575 %
Difference---+180000-71400000-16.8313-0.0150 %-16.8313-0.0054 %

Known prime factors (1 factor, 87.1 bits, 0.00011169% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
779982791673698617438497670362226072787.1131072907401866198657
3 × 11 × 43 × 14249 × 44203 × 1200449
2015-07-17442031200449427,6740.48500.5527

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-07-17David HruskaDesktopIIc680000136000001222787.1135.6583.756%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-17ANONYMOUSv4_computers212531.54000e-5
2022-06-27LordJuliusManual testing21264
2010-10-21Beat BucheliI72642650.048
2010-10-27arnaudATTAX152652660.096
2011-03-03rglarsonrgl_s_VOT1322662670.192
2011-03-17ANONYMOUS2672680.383
2011-03-24ANONYMOUS2682690.766
2011-04-05ANONYMOUS2692701.533
2013-01-26SMoffatManual testing2702713.066
2015-06-18Jerry HallettManual testing27127442.92
2015-06-23ChuckManual testing27427549.05


ECM factoring results:
No ECM results for M77998279


Lucas-Lehmer results:
No L-L results for M77998279


PRP results:
No PRP results for M77998279


CERT results:
No CERT results for M77998279


P-1 factor-bounds graph:
B1 = 680000, B2 = 13600000 (P-1 stage 2)
B1 = 680000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00