is 2 48905947 - 1
has 14722158 decimal digits
takes 84.906 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
Actual2692.441262.3188 %----2.441262.3188 %
Target27339.112764.3836 %320000500000007.61933.6723 %46.732065.6915 %
Difference-4-36.6716-2.0647 %-320000-50000000-7.6193-3.6723 %-44.2909-3.3727 %

Known prime factors (2 factors, 175.1 bits, 0.00035809% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4890594717208520635467633388172270.54417593484730464
25 × 712 × 479 × 227693
2010-03-1250412276934.99600.04320.0583
489059473039325233228054070808286643123132104.584310731661450912510784045
5 × 7 × 37 × 71 × 10909 × 24923 × 74719 × 166357
2010-03-12747191663573.411e+90.20070.3828

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-03-12Tom MuellerManual testing53175.1272.0140.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-09-29Jossv4_computers212544.91000e-5
2003-06-06Thomas Mullenv4_computers212590.001
2007-12-031997rj7v4_computers212630.020
2008-06-22ComputerraRUv4_computers2632650.117
2008-07-12tmorrowv4_computers212691.222


ECM factoring results:
No ECM results for M48905947


Lucas-Lehmer results:
No L-L results for M48905947


PRP results:
No PRP results for M48905947


CERT results:
No CERT results for M48905947


P-1 factor-bounds graph:
102
103
104
105
102
103
104
105
106
TF factor-bounds graph:
269
265
263
259
254
this exponent TF target: 73
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00