is 2 55844281 - 1
has 16810804 decimal digits
takes 118.359 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
Actual2718.560963.3803 %----8.560963.3803 %
Target27334.253264.3836 %3600006000000011.09223.9377 %45.345465.7860 %
Difference-2-25.6923-1.0033 %-360000-60000000-11.0922-3.9377 %-36.7845-2.4057 %

Known prime factors (1 factor, 78.3 bits, 0.00014017% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
558442813659386955020661029138012478.2763276420512084900
22 × 52 × 29 × 373 × 2333 × 1298309
2012-03-11233312983091,869.70.22420.4060

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-11Brian V.debian8x2478.2764.0450.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.15000e-5
2000-03-01ANONYMOUSv4_computers212544.30000e-5
2000-06-11ANONYMOUSv4_computers212560.000
2001-09-22ANONYMOUSv4_computers212570.000
2002-08-17ANONYMOUSv4_computers212580.001
2008-11-171997rj7Manual testing212640.034
2009-01-08ANONYMOUS2642650.067
2009-03-12XPANSiVEmy_computer2652660.134
2009-11-18sunithayaboxx2662670.268
2009-11-21sunithayaboxx2672680.535
2011-04-14symalla2682691.071
2011-06-08ANONYMOUS2692702.141
2011-10-09amberjrManual testing2702714.282


ECM factoring results:
No ECM results for M55844281


Lucas-Lehmer results:
No L-L results for M55844281


PRP results:
No PRP results for M55844281


CERT results:
No CERT results for M55844281


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
107
TF factor-bounds graph:
271
270
269
268
267
266
265
264
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00