is 2 2512897 - 1
has 756458 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
Actual26711.824667.1642%2000000600000000.51907.6512%12.343569.6765%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+11.1894+2.0848%+1989000+59830000+0.5170+6.2423%+11.7064+4.1051%+4.1051%

Known prime factors (1 factor, 36.5 bits, 0.00145417% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
25128971000334037771236.54219904
26 × 311
-643114.766e-97.790e-61.310e-5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-04T12:39:08alpertronManual testing20000006000000012-
skipped known factor: 100033403777
--0.519--7.651%


Trial Factoring results:
No TF results for M2512897


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 M2512897


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-14T13:31:32kkmrkkblmbrbkc4.xlarge2BE01B728D228A__no
2017-11-08T02:02:19Oliver KruseGTX-0
100033403777
2BE01B728D228A__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (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:
267
230
240
250
260
270
280
290
2100
Last modified: 2019-07-04T12:39:08+00:00