is 2 386723 - 1
has 116416 decimal digits
takes 0.004 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
Actualunknown50000500000.000710.0968%0.000710.0968%
Target2440.000056.8182%700010000000.000912.7894%0.000962.3409%
Difference-440.0000-56.8182%+43000-950000-0.0002-2.6926%-0.0002-52.2441%

Known prime factors (1 factor, 19.6 bits, 0.00505813% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
386723773447619.5611
1
-111.806e-131.406e-82.861e-8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-02-06Lisander ViaeneManual testing5000050000-
skipped known factor: 773447
--0.001--10.097%


Trial Factoring results:
No TF results for M386723


ECM factoring results:
Total ECM effort:10.526 GHz-days
Estimated T-Level:26.435
DigitsB1CompleteFacMiss
201100023.8990.000%
25500003.0284.840%
302500000.28775.049%
3510000000.02297.832%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002812.955
250000250000001447.571


Lucas-Lehmer results:
No L-L results for M386723


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23Oliver KruseOllaptop
773447
F251F2127067FC__no
2017-11-02kkmrkkblmbrbkc4.xlarge
773447
F251F2127067FC__no
2020-04-18Oliver KruseAddPrpType5
773447
7B692158493B57__no
2022-05-12Jorge CoveiroManual testing
773447
7B692158493B57F7no


P-1 factor-bounds graph:
B1 = 50000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
ECM T-Level=26.44 ~= 71-bit
250
260
270
280
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Last modified: 2023-10-02T12:12:48+00:00