is 2 11284909 - 1
has 3397097 decimal digits
takes 3.818 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 PRP tests remaining
ResidueStatus
L-LC24AD4ED6BDAC52Edouble-checked
PRP317958BF994D3D8FPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.633164.1791 %6500011212500.06012.7553 %2.693265.1661 %
Target2685.281864.7059 %8000095000000.29102.8802 %5.572865.7224 %
Difference-1-2.6488-0.5268 %-15000-8378750-0.2309-0.1249 %-2.8797-0.5563 %

Known prime factors (1 factor, 68.0 bits, 0.00060213% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
112849092851573006181923841112167.95012634452817395
3 × 5 × 53 × 11833 × 1343057
2015-02-221183313430572.77930.04140.0670

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-12-31ANONYMOUSv4_computers650001121250--0.0602.439%
2015-02-22Sid & AndyHamm2167.9500.1250.000%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212640.174
2013-11-20lycornManual testing2642650.331


ECM factoring results:
No ECM results for M11284909


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-04-29binarydigitsv4_computersC24AD4ED6BDAC52E3.818
2004-05-25ANONYMOUSv4_computersC24AD4ED6BDAC52E3.818


PRP results:
dateuseridcompidcofactorsres64
2021-06-27Jonathan WebbDesktop2021
285157300618192384111
317958BF994D3D8F


CERT results:
dateuseridcompid
2021-06-27Ben Deloi-012e8f9e38365357c


P-1 factor-bounds graph:
B1 = 65000, B2 = 1121250 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
103
104
105
103
104
105
106
107
TF factor-bounds graph:
265
264
this exponent TF target: 68
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00