is 2 4915037 - 1
has 1479574 decimal digits
takes 0.681 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
Actual2676.045565.6716%----6.045565.6716%0.0000%
PrimeNet2610.062562.2951%220004500000.00913.3038%0.071663.5408%1.2457%
GPU722651.484464.6154%320007000000.01372.3752%1.498165.4558%0.8405%
Difference+2+4.5611+1.0563%-32000-700000-0.0137-2.3752%+4.5474+0.2158%+0.2158%

Known prime factors (2 factors, 124.8 bits, 0.00253835% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49150372585374273643896811857.84326300659320
23 × 32 × 5 × 13 × 43 × 130693
-431306930.00550.00140.0027
49150371393908936041531350812166.91814180045196420
22 × 32 × 5 × 43 × 131 × 13985093
2019-08-05131139850933.12320.15320.2860

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
49150373603776303044111131254747775431549916138124.761
P-1 results:
No P-1 results for M4915037


Trial Factoring results:
No TF results for M4915037


ECM factoring results:

Old Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.06593.752%
25500000.00699.419%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020.420


Lucas-Lehmer results:
No L-L results for M4915037


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:45:23kkmrkkblmbrbkManual testing
258537427364389681
D47BB56843E581__no
2018-04-07T08:34:58ATHec2-PRPCFDC
258537427364389681
D47BB56843E581__no
2019-08-06T07:24:36Niels_Mache_NextcloudSuperDry-X
258537427364389681
139390893604153135081
630969E8FD249E19no
2019-08-08T02:26:28arnaudstm-11-010
258537427364389681
139390893604153135081
630969E8FD249E19no


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2019-08-08T02:26:28+00:00