is 2 54941581 - 1
has 16539064 decimal digits
takes 108.548 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
Actual2718.701663.3803 %----8.701663.3803 %
Target27334.816064.3836 %3600006000000010.33993.9295 %45.155965.7831 %
Difference-2-26.1144-1.0033 %-360000-60000000-10.3399-3.9295 %-36.4543-2.4028 %

Known prime factors (1 factor, 107.6 bits, 0.00019587% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5494158124859029675911530170496270203950333107.6152262314737167058422517571
7 × 17 × 521 × 839 × 47717 × 178351 × 5110433
2012-03-1617835151104332.643e+91.28071.4898

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-16blablatheblaXPS33107.6153.6080.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.18000e-5
2000-03-01ANONYMOUSv4_computers212544.37000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-08-26ANONYMOUSv4_computers212570.000
2002-10-12ANONYMOUSv4_computers212580.001
2008-07-29ANONYMOUSManual testing212630.018
2008-12-30ANONYMOUSsmartC2D2632640.036
2009-01-11ANONYMOUSsmartC2D2642650.068
2009-01-15ANONYMOUSsmartC2D2652660.136
2009-01-17ANONYMOUSsmartC2D2662670.272
2009-09-11KriZpopt2672680.544
2011-04-01steinrarManual testing2682691.088
2011-05-23Zet_korrnd_32692702.176
2011-08-20TheJudgerManual testing2702714.352


ECM factoring results:
No ECM results for M54941581


Lucas-Lehmer results:
No L-L results for M54941581


PRP results:
No PRP results for M54941581


CERT results:
No CERT results for M54941581


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
271
270
269
268
267
266
265
264
263
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
2100
2110
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Last modified: 2024-03-13T02:15:48+00:00