is 2 131423899 - 1
has 39562536 decimal digits
takes 697.277 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
Actual27558.223164.0000 %12250002940000021.23324.9453 %79.456365.7803 %
Target277232.896564.9351 %80000015000000068.69003.9300 %301.586566.3131 %
Difference-2-174.6734-0.9351 %+425000-120600000-47.4567+1.0154%-222.1301-0.5328 %

Known prime factors (1 factor, 89.2 bits, 0.00006784% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1314238996926304587893584414781795032789.1622635100860876751349
32 × 73 × 7757 × 248041 × 2084561
2021-04-082480412084561953,9502.67803.8835

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-04-08yphysicsManual testing122500029400000622789.16221.234.123%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-02ANONYMOUS2632640.015
2010-11-15Charles A. Morrismagnetar2642650.028
2012-09-17VictordeHollanderManual testing2652680.398
2012-09-17VictordeHollanderManual testing2682690.455
2013-01-17VictordeHollanderManual testing2692700.910
2016-06-21Gordon BowerManual testing2702711.820
2016-06-21Gordon BowerManual testing2712723.639
2016-06-21Gordon BowerManual testing2722737.278
2016-06-21Gordon BowerManual testing27327414.56
2016-06-21Gordon BowerManual testing27427529.11


ECM factoring results:
No ECM results for M131423899


Lucas-Lehmer results:
No L-L results for M131423899


PRP results:
No PRP results for M131423899


CERT results:
No CERT results for M131423899


P-1 factor-bounds graph:
B1 = 1225000, B2 = 29400000 (P-1 stage 2)
B1 = 1225000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
TF factor-bounds graph:
275
274
273
272
271
270
269
268
265
264
this exponent TF target: 77
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00