is 2 81949321 - 1
has 24669204 decimal digits
takes 255.722 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
Actual27593.373764.0000 %690000136275006.31143.7869 %99.685065.3633 %
Target27593.373764.0000 %5500009000000024.53973.8863 %117.913365.3991 %
Difference---+140000-76372500-18.2283-0.0993 %-18.2283-0.0358 %

Known prime factors (1 factor, 77.2 bits, 0.00009421% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
819493211741054744794478364683372477.2041062275271807608
23 × 2789 × 31063 × 1532693
2017-07-03310631532693548.770.51070.7057

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-07-03ixfd64libra69000013627500622477.2046.3113.787%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-10Architects Cubedm1_172642650.046
2011-03-02bzmManual testing2652660.091
2011-03-08ANONYMOUS2662670.182
2011-03-14oddprimecomputer-82672680.365
2011-03-21ANONYMOUS2682690.729
2011-03-25Åke TilanderPC51-114-122692701.459
2013-06-10sannerud.comJarrett20122702712.918
2016-08-181997rj7Manual testing27127317.51
2016-11-26BdotManual testing27327570.03


ECM factoring results:
No ECM results for M81949321


Lucas-Lehmer results:
No L-L results for M81949321


PRP results:
No PRP results for M81949321


CERT results:
No CERT results for M81949321


P-1 factor-bounds graph:
B1 = 690000, B2 = 13627500 (P-1 stage 2)
B1 = 690000 (P-1 stage 1)
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108
TF factor-bounds graph:
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267
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265
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00