is 2 7965241 - 1
has 2397777 decimal digits
takes 1.823 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L1B932A0EE6E66769double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.730465.6716 %867000142014600025.943611.8525 %29.674069.7404 %
Target2673.730465.6716 %5500060000000.12572.5650 %3.856266.5522 %
Difference---+812000+1414146000+25.8179+9.2874%+25.8179+3.1882 %

Known prime factors (1 factor, 65.0 bits, 0.00081547% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7965241357454019091217834792064.9542243836809779
71 × 43933 × 719353
2009-07-17439337193530.51990.02680.0297

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-17Carsten Kossendeymother2064.9540.0310.000%
2024-02-14Stef42128G8670001420146000
skipped known factor: 35745401909121783479
--25.9411.852%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-07ANONYMOUSv4_computers212620.039
1998-11-14ANONYMOUSv4_computers212630.123


ECM factoring results:
No ECM results for M7965241


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-15ANONYMOUSv4_computers1B932A0EE6E667691.823


PRP results:
dateuseridcompidcofactorsres64
2018-06-27Oliver KruseGTX-0
35745401909121783479
8591C52D50476779
2019-12-13krackerGRID-11
35745401909121783479
8591C52D50476779


CERT results:
No CERT results for M7965241


P-1 factor-bounds graph:
B1 = 867000, B2 = 1420146000 (P-1 stage 2)
B1 = 867000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00