is 2 4915109 - 1
has 1479596 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
Actual2676.045465.6716%----6.045465.6716%0.0000%
PrimeNet2610.062562.2951%220004500000.00913.3038%0.071663.5408%1.2457%
GPU722651.484364.6154%320007000000.01372.3752%1.498165.4559%0.8405%
Difference+2+4.5611+1.0563%-32000-700000-0.0137-2.3752%+4.5473+0.2158%+0.2158%

Known prime factors (3 factors, 183.2 bits, 0.00372745% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49151091739293720076154491857.27117693338236
22 × 3 × 7 × 109 × 1932431
-10919324310.00740.02120.0395
49151092161470861778860891857.58521988025716
22 × 5497006429
2015-08-06454970064290.007560.194112.43
49151093767264698890848707032168.35238323307772939
3 × 7 × 1019 × 1790892461
2019-08-051019179089246118.70619.61136.627

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
49151093759432696019566485859240443858896135114.856
49151096552379832645438243446435000551029064738125.623
49151098142832875260683636048579289642735056738125.937
491510914162778083570563695856770552752295298769458694448
109583
56183.208
P-1 results:
No P-1 results for M4915109


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-07-01T11:25:00TJAOIManual testing257258*57.585180.0041.4390.008


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 M4915109


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:45:23kkmrkkblmbrbkManual testing
173929372007615449
216147086177886089
376953C020F574__no
2018-04-09T09:27:50Oliver KruseGTX-5
173929372007615449
216147086177886089
376953C020F574__no
2019-08-06T07:50:17Niels_Mache_NextcloudSuperDry-X
173929372007615449
216147086177886089
376726469889084870703
6298D9F2EF4BAC7Dno
2019-08-06T08:50:03ATHec2-PRPCFDC
173929372007615449
216147086177886089
376726469889084870703
6298D9F2EF4BAC7Dno


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2019-08-06T08:50:03+00:00