is 2 53246881 - 1
has 16028909 decimal digits
takes 102.007 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
Actual2681.119461.7647 %----1.119461.7647 %
Target27335.924164.3836 %3600006000000010.02613.9139 %45.950265.7776 %
Difference-5-34.8047-2.6189 %-360000-60000000-10.0261-3.9139 %-44.8308-4.0129 %

Known prime factors (1 factor, 83.1 bits, 0.00015605% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
53246881103069707414908227900877212683.09296784736945351060
22 × 5 × 23 × 67 × 127 × 199 × 8419 × 14759
2010-11-2884191475955,1050.02430.0476

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-11-28lindedG88143RBXYL-TNE2683.0921.9510.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.25000e-5
2000-03-01ANONYMOUSv4_computers212544.51000e-5
2000-05-24ANONYMOUSv4_computers212560.000
2001-07-29ANONYMOUSv4_computers212570.000
2002-06-23ANONYMOUSv4_computers212580.001
2004-04-201997rj7v4_computers212600.001
2007-11-171997rj7v4_computers212630.018
2008-07-14ANONYMOUSManual testing212640.035
2008-12-17James Hintz172642650.070
2008-12-19James Hintz172652660.140
2008-12-22James Hintz172662670.281
2009-04-26KonradWORK22672680.561


ECM factoring results:
No ECM results for M53246881


Lucas-Lehmer results:
No L-L results for M53246881


PRP results:
No PRP results for M53246881


CERT results:
No CERT results for M53246881


P-1 factor-bounds graph:
102
103
104
102
103
104
105
TF factor-bounds graph:
268
267
266
265
264
263
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00