is 2 77156381 - 1
has 23226386 decimal digits
takes 217.538 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
Actual2680.772560.2941 %----0.772560.2941 %
Target27449.585963.5135 %5000009000000021.97904.1976 %71.564865.0451 %
Difference-6-48.8133-3.2194 %-500000-90000000-21.9790-4.1976 %-70.7923-4.7509 %

Known prime factors (1 factor, 68.5 bits, 0.00008875% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
771563814095734020849067031532168.4732654177119096
23 × 19 × 443 × 39416911
2012-03-21443394169111.48968.781316.398

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-21tscv4_computers2168.4735.1620.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-17ANONYMOUSv4_computers212531.56000e-5
2003-12-02ANONYMOUSv4_computers212610.002
2008-08-26ANONYMOUSManual testing212650.048
2010-12-20Christian GeschwentnerManual testing2652660.097
2011-01-04ShintaroL51002662670.194
2011-01-31searchingforprimesHarwich6b2672680.387


ECM factoring results:
No ECM results for M77156381


Lucas-Lehmer results:
No L-L results for M77156381


PRP results:
No PRP results for M77156381


CERT results:
No CERT results for M77156381


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
261
253
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00