is 2 1468591 - 1
has 442090 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L29CD1FA766CFF689double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26720.232968.6567 %500000150000000.07144.9357 %20.304470.2037 %
Target2600.104665.0000 %65005000000.00181.4468 %0.106465.5064 %
Difference+7+20.1284+3.6567 %+493500+14500000+0.0696+3.4889%+20.1979+4.6974 %

Known prime factors (2 factors, 147.3 bits, 0.01003152% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14685915117779521984675513912168.794174241144130145
3 × 5 × 809 × 3919 × 3663833
2009-06-063919366383361.0720.01130.0206
14685914357851795867851639491132478.528148368463236798116
22 × 13 × 5861 × 486817894153
2019-03-29586148681789415380,6251,468.42,742.5

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers20000270000--0.0022.640%
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 511777952198467551391
---9.456%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-06ANONYMOUSv4_computers212570.013
2003-07-30ANONYMOUSv4_computers212580.026


ECM factoring results:
Total ECM effort:29.904 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
10.042
50000500000019510.75
500005000000563.108
250000350000005016.01


Lucas-Lehmer results:
No L-L results for M1468591


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-0
511777952198467551391
9A51F08BB30AD241
2017-10-28kkmrkkblmbrbkold
511777952198467551391
9A51F08BB30AD241
2019-03-29ATHec2-PRPCF
511777952198467551391
435785179586785163949113
EF7BBA9644E78446
2019-03-30oodairacom1
511777952198467551391
435785179586785163949113
EF7BBA9644E78446


CERT results:
No CERT results for M1468591


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
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280
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Last modified: 2024-03-13T02:15:48+00:00