is 2 81204691 - 1
has 24445048 decimal digits
takes 253.398 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
Actual27594.229964.0000 %690000141450006.43903.8113 %100.668865.3721 %
Target27594.229964.0000 %5500009000000024.53973.8819 %118.769565.3975 %
Difference---+140000-75855000-18.1007-0.0706 %-18.1007-0.0254 %

Known prime factors (1 factor, 88.3 bits, 0.00010870% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
812046913722330152927572258834906712788.2662291942809638652685
5 × 23 × 59 × 1327 × 280591 × 907213
2017-05-042805919072131,243,9741.42412.5838

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-05-04MersenneMarconix38M3690000141450001222788.2666.4393.811%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-12Architects Cubedm1_492642650.046
2011-03-04Pi_RhoManual testing2652660.092
2011-03-15Pi_RhoManual testing2662670.184
2013-01-26rjbelansManual testing2672680.368
2013-01-29SETIKAH64primetest2682690.736
2013-02-27Hollie L Buchanan IINetBook2692701.472
2013-06-06SMoffatManual testing2702712.945
2014-01-21processinfoManual testing27127317.67
2016-11-01ANONYMOUSManual testing27327570.67


ECM factoring results:
No ECM results for M81204691


Lucas-Lehmer results:
No L-L results for M81204691


PRP results:
No PRP results for M81204691


CERT results:
No CERT results for M81204691


P-1 factor-bounds graph:
B1 = 690000, B2 = 14145000 (P-1 stage 2)
B1 = 690000 (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