is 2 53924257 - 1
has 16232819 decimal digits
takes 106.538 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
Actual2718.865763.3803 %----8.865763.3803 %
Target27335.472864.3836 %3600006000000010.33993.9202 %45.812765.7798 %
Difference-2-26.6071-1.0033 %-360000-60000000-10.3399-3.9202 %-36.9470-2.3995 %

Known prime factors (1 factor, 83.0 bits, 0.00015390% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5392425795952707489506365058766332582.98988969892982954188
22 × 17 × 109 × 619 × 5297 × 3660893
2011-07-165297366089318,6670.58571.0672

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-07-16kdgehmanE67002582.9894.7300.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.23000e-5
2000-03-01ANONYMOUSv4_computers212544.45000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-08-24ANONYMOUSv4_computers212570.000
2002-08-10ANONYMOUSv4_computers212580.001
2004-06-121997rj7v4_computers212600.001
2007-10-291997rj7v4_computers212630.018
2008-09-14ANONYMOUSManual testing212640.035
2008-12-22vidmarKids2642650.069
2009-01-05Davekv4_computers212692.079
2009-01-14Davekv4_computers212691.109
2011-05-14Paul LeylandManual testing2692702.217
2011-07-07kdgehmanManual testing2702714.435


ECM factoring results:
No ECM results for M53924257


Lucas-Lehmer results:
No L-L results for M53924257


PRP results:
No PRP results for M53924257


CERT results:
No CERT results for M53924257


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
107
TF factor-bounds graph:
271
270
269
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