is 2 423287 - 1
has 127423 decimal digits
takes 0.004 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actualunknown30000001000000000.116543.1827%0.116543.1827%43.1827%
PrimeNet2400.000052.5000%40001400000.000217.8508%0.000260.9791%8.4791%
GPU722440.000056.8182%70002200000.000313.1619%0.000362.5017%5.6835%
Difference-440.0000-56.8182%+2993000+99780000+0.1162+30.0209%+0.1162-19.3190%+37.4992%

Known prime factors (1 factor, 42.7 bits, 0.01008385% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
42328770639929296891342.6848344212
22 × 3 × 17 × 40903
-17409031.532e-63.155e-55.851e-5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T18:47:52alpertronManual testing300000010000000012-
skipped known factor: 7063992929689
--0.116--34.680%


Trial Factoring results:
No TF results for M423287


ECM factoring results:
Total ECM effort:10.576 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
5000050000002812.969
250000250000001447.607


Lucas-Lehmer results:
No L-L results for M423287


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-23T13:21:51Oliver KruseDoppelherz
7063992929689
31AA436D4FAFFC__no
2017-09-24T17:46:56Oliver KruseManual testing
7063992929689
31AA436D4FAFFC__no
2017-11-07T01:18:12kkmrkkblmbrbkc4.xlarge
7063992929689
31AA436D4FAFFC__no
2020-04-18T17:45:38Oliver KruseAddPrpType5
7063992929689
55EC12CFA00EA9__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
240
250
260
270
280
290
2100
Last modified: 2020-08-28T11:11:09+00:00