is 2 2497039 - 1
has 751684 decimal digits
takes 0.173 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
Actual26711.899767.1642%2000000600000000.51907.6463%12.418669.6749%2.5107%
PrimeNet2590.030862.7119%100001800000.00192.5373%0.032763.6580%0.9461%
GPU722630.639265.0794%110001600000.00191.3818%0.641165.5619%0.4825%
Difference+4+11.2605+2.0848%+1989000+59840000+0.5170+6.2645%+11.7775+4.1130%+4.1130%

Known prime factors (1 factor, 31.0 bits, 0.00124332% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
249703922173706331031.046444
22 × 3 × 37
-4371.256e-105.831e-78.187e-7

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-04T12:38:10alpertronManual testing20000006000000012-
skipped known factor: 2217370633
--0.519--7.646%


Trial Factoring results:
No TF results for M2497039


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 M2497039


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-14T07:58:20kkmrkkblmbrbkc4.xlargeBB8D18414BA0DC__no
2017-11-07T05:55:45Oliver KruseThreadripper
2217370633
BB8D18414BA0DC__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: 2019-07-04T12:38:10+00:00