is 2 6235837 - 1
has 1877174 decimal digits
takes 1.105 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L16CDB0325E0354EDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.765065.6716 %300002400000.01061.3736 %4.775766.1432 %
Target2662.368365.1515 %4000045000000.07272.4326 %2.441065.9992 %
Difference+1+2.3967+0.5201 %-10000-4260000-0.0621-1.0590 %+2.3346+0.1439 %

Known prime factors (1 factor, 64.6 bits, 0.00103537% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6235837272746693472695999612064.5642186929304540
22 × 5 × 37 × 7703 × 383657
2013-04-2277033836570.76790.00720.0100

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-03-11ANONYMOUSv4_computers30000240000--0.0111.580%
2013-04-22Squeeky_SquirrelP4_26002064.5640.0600.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-11Mark Dv4_computers212610.025
1998-07-21ANONYMOUSv4_computers212620.049


ECM factoring results:
Total ECM effort:0.808 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.808


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28ANONYMOUSv4_computers16CDB0325E0354ED1.105
2001-03-25ANONYMOUSv4_computers16CDB0325E0354ED1.105


PRP results:
dateuseridcompidcofactorsres64
2017-10-14kkmrkkblmbrbkc4.xlarge
27274669347269599961
D88BE3F78EDF1575
2018-09-24rucio
27274669347269599961
D88BE3F78EDF1575


CERT results:
No CERT results for M6235837


P-1 factor-bounds graph:
B1 = 30000, B2 = 240000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
TF factor-bounds graph:
262
261
this exponent TF target: 66
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00