is 2 27777391 - 1
has 8361828 decimal digits
takes 25.713 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
Actual2694.298063.7681 %----4.298063.7681 %
Target2708.602364.2857 %200000300000002.44773.9159 %11.050165.6843 %
Difference-1-4.3044-0.5176 %-200000-30000000-2.4477-3.9159 %-6.7521-1.9161 %

Known prime factors (2 factors, 81.3 bits, 0.00029275% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2777739144443825611032.04980
24 × 5
-16162.096e-112.148e-54.371e-5
277773916779358936225131549.26812203016
23 × 3 × 7 × 19 × 3823
2014-04-251938233.633e-60.00030.0005

1 Composite Factors:
P-1 results:
No P-1 results for M27777391


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-04-25TJAOIManual testing??
49.268
15
2024-03-07masserManual testing267269


ECM factoring results:
No ECM results for M27777391


Lucas-Lehmer results:
No L-L results for M27777391


PRP results:
No PRP results for M27777391


CERT results:
No CERT results for M27777391


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
TF factor-bounds graph:
269
this exponent TF target: 70
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00