is 2 47 - 1
has 15 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 PRP tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPED1BFDC147DBD8F0PRP-tested
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267632,211.011591.0448 %----632,211.011591.0448 %
Target2440.049986.3636 %500500000.00000.2090 %0.049986.3921 %
Difference+23+632,210.9617+4.6811 %-500-500000.0000-0.2090 %+632,210.9617+4.6526 %

Known prime factors (3 factors, 47.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
472351411.19925
52
-25255.831e-123.685e-107.500e-10
474513412.14048
24 × 3
-16161.172e-112.359e-104.800e-10
47
hide decimal representation
13264529
823.661

1 Composite Factors:
P-1 results:
No P-1 results for M47


Trial Factoring results:
5758596061626364656667
No TF results for M47


ECM factoring results:
No ECM results for M47


Lucas-Lehmer results:
No L-L results for M47


PRP results:
dateuseridcompidcofactorsres64
2018-01-24Luke_Richardswork-laptopED1BFDC147DBD8F0
2018-01-24_p95holder_TFL5_PRPt16-E_q
2351
4513
Probable Prime!


CERT results:
No CERT results for M47


P-1 factor-bounds graph:
100
101
102
100
101
102
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00