is 2 55442887 - 1
has 16689973 decimal digits
takes 117.508 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
Actual2670.535961.1940 %----0.535961.1940 %
Target27334.501264.3836 %3600006000000011.09223.9341 %45.593465.7847 %
Difference-6-33.9652-3.1895 %-360000-60000000-11.0922-3.9341 %-45.0575-4.5907 %

Known prime factors (2 factors, 103.2 bits, 0.00018616% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5544288722615495135483931651.00620395308
22 × 3 × 172 × 5881
1999-12-1528958818.488e-60.00180.0018
5544288751970557756650231652.20746868553
32 × 29 × 179573
2014-07-31291795731.849e-50.03020.0562

1 Composite Factors:
P-1 results:
No P-1 results for M55442887


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers??
51.006
16
2014-07-31TJAOIManual testing??
52.207
16
1.43426e-5


ECM factoring results:
No ECM results for M55442887


Lucas-Lehmer results:
No L-L results for M55442887


PRP results:
No PRP results for M55442887


CERT results:
No CERT results for M55442887


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
TF factor-bounds graph:
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