is 2 287597 - 1
has 86576 decimal digits
takes 0.002 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
Actualunknown50000500000.000514.8876%0.000514.8876%14.8876%
PrimeNet2400.000052.5000%3000800000.000115.0671%0.000159.6568%7.1568%
GPU722440.000056.8182%50001300000.000110.8823%0.000161.5173%4.6992%
Difference-440.0000-56.8182%+45000-80000+0.0004+4.0053%+0.0004-46.6298%-46.6298%

Known prime factors (2 factors, 103.7 bits, 0.03605259% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2875974026359721.9417
7
-179.729e-131.315e-82.017e-8
28759740525713149711935679969032581.7457045572997929730783
7045572997929730783
2022-05-16170455729979297307832,802,3243.803e+97.104e+9

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2875971631710698717609996324644236617732103.686
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-02-06T16:48:39Lisander ViaeneManual testing5000050000-
skipped known factor: 4026359
--0.000--9.701%


Trial Factoring results:
No TF results for M287597


ECM factoring results:

Old Calculation Method

Total ECM effort:9.306 GHz-days
Estimated T-Level:26.461
DigitsB1CurvesCompleteFacMiss
2011000475 / 1004.7500.845%
2550000475 / 2801.69618.278%
30250000187 / 6400.29274.646%

New Calculation Method

Total ECM effort:9.306 GHz-days
Estimated T-Level:26.461
DigitsB1CompleteFacMiss
201100028.5690.000%
25500003.7172.432%
302500000.36169.678%
3510000000.02897.229%
4030000000.00299.819%


ECM Summary

B1B2factorcurvesGHz-days
50000130000100.049
5000050000002812.056
500005000000070.205
250000250000001585.780
2500003425000070.288
25000036263680140.589
2500003675000070.296
2500003675000010.042


Lucas-Lehmer results:
No L-L results for M287597


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T12:44:43Oliver KruseDoppelherz
4026359
9B8AC05E7D91B4__no
2017-09-24T17:45:27Oliver KruseManual testing
4026359
9B8AC05E7D91B4__no
2017-10-12T19:49:37Oliver KruseGTX-19B8AC05E7D91B4__no
2017-11-06T20:30:15kkmrkkblmbrbkc4.xlarge
4026359
9B8AC05E7D91B4__no
2020-04-17T22:11:06Oliver KruseAddPrpType5
4026359
78461B315570CB__no
2022-05-16T03:31:29aperson12012_VP113
4026359
4052571314971193567996903
78461B315570CB0Dno


P-1 factor-bounds graph:
B1 = 50000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
TF factor-bounds graph:
220
230
240
250
260
270
280
290
2100
Last modified: 2022-07-15T21:35:36+00:00