is 2 76480981 - 1
has 23023070 decimal digits
takes 212.846 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
Actual275100.049864.0000 %6450006450002.60281.5337 %102.652664.5521 %
Target27450.023863.5135 %5000009000000021.69484.1930 %71.718565.0434 %
Difference+1+50.0261+0.4865 %+145000-89355000-19.0920-2.6594 %+30.9341-0.4913 %

Known prime factors (1 factor, 78.5 bits, 0.00010264% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
764809814269424111852659433761772478.4982791167200021048
23 × 29 × 73 × 103 × 32801 × 48781
2015-12-1432801487811,040.90.13590.2694

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-12-14NesowaIceblock64500064500012478.4982.6371.722%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212502.00000e-6
2000-08-10ANONYMOUSv4_computers212531.57000e-5
2004-03-01markrv4_computers212620.004
2008-03-031997rj7v4_computers212640.026
2010-09-04GrunwalderGIMPLyc-i72642650.049
2010-09-05drewha - Belarusmicrosof-c9f5b72652660.098
2010-12-13S485122Q67-P2662691.368
2010-12-14S485122Q67-P2692701.563
2012-12-18jack731Manual testing2702713.127
2015-12-05garoManual testing27127443.77
2015-12-07dh1Manual testing27427550.03


ECM factoring results:
No ECM results for M76480981


Lucas-Lehmer results:
No L-L results for M76480981


PRP results:
No PRP results for M76480981


CERT results:
No CERT results for M76480981


P-1 factor-bounds graph:
B1 = 645000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
274
271
270
269
266
265
264
262
253
250
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