is 2 2512919 - 1
has 756464 decimal digits
takes 0.174 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
Actual26711.824567.1642%2000000600000000.51907.6512%12.343469.6765%2.5123%
PrimeNet2590.030662.7119%110001900000.00212.6415%0.032663.6968%0.9850%
GPU722630.635165.0794%110001700000.00201.4089%0.637165.5714%0.4920%
Difference+4+11.1893+2.0848%+1989000+59830000+0.5170+6.2423%+11.7063+4.1051%+4.1051%

Known prime factors (2 factors, 115.0 bits, 0.00457671% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
25129199042060734403531549.684179911504
24 × 269 × 41801
-269418015.623e-50.00030.0004
2512919462247212129158267032065.3259197415677329
11 × 240131 × 3481969
2018-09-2024013134819693.32100.04190.0492

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
25129194179667366380561120293929035514615935115.009
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-04T12:39:08alpertronManual testing20000006000000012-
skipped known factor: 904206073440353
skipped known factor: 46224721212915826703
--0.519--7.651%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2018-09-20T12:33:47TJAOIManual testing265266*65.325200.4180.3540.848


ECM factoring results:

Old Calculation Method

Total ECM effort:0.276 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.276 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.276


Lucas-Lehmer results:
No L-L results for M2512919


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-14T13:48:25kkmrkkblmbrbkc4.xlargeC26933A814C5B5__no
2017-11-08T02:16:02Oliver KruseGTX-1
904206073440353
C26933A814C5B5__no
2018-09-22T07:31:58Oliver KruseGTX-2
904206073440353
46224721212915826703
C26933A814C5B5__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
266
240
250
260
270
280
290
2100
Last modified: 2019-07-04T12:39:08+00:00