is 2 1412447 - 1
has 425189 decimal digits
takes 0.054 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
Actual26721.037268.6567%500000150000000.07144.9125%21.108670.1965%1.5397%
PrimeNet2560.006862.5000%65001100000.00072.7669%0.007563.5376%1.0376%
GPU722600.108765.0000%6000700000.00051.2450%0.109365.4358%0.4358%
Difference+7+20.9285+3.6567%+494000+14930000+0.0709+3.6675%+20.9993+4.7607%+4.7607%

Known prime factors (2 factors, 107.0 bits, 0.00757837% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14124471229619860331236.83943528
23 × 5441
-854419.214e-91.683e-53.065e-5
141244713571551380018555879612270.201480426925046340
22 × 3 × 5 × 35543 × 225279673
2018-09-1035543225279673303.300.68141.2691

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
141244716687849112359835433494348494871333107.040
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:13:59alpertronManual testing5000001500000012-
skipped known factor: 122961986033
--0.071--4.913%


Trial Factoring results:
No TF results for M1412447


ECM factoring results:

Old Calculation Method

Total ECM effort:25.549 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000304 / 1003.0404.711%
2550000304 / 2801.08633.700%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.549 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.3600.000%
25500001.36625.525%
302500000.11489.267%
3510000000.00899.234%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.83
50000500000030.141
250000350000005013.58


Lucas-Lehmer results:
No L-L results for M1412447


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T18:16:47Oliver KruseGTX-3
122961986033
F0072678726D0E__no
2017-10-26T07:20:25kkmrkkblmbrbkc4.xlarge
122961986033
F0072678726D0E__no
2018-09-11T04:26:03Oliver KruseGTX-2
122961986033
1357155138001855587961
5A4DCB20638288__no
2018-09-11T04:37:58ANONYMOUS
122961986033
1357155138001855587961
5A4DCB20638288__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2021-10-28T13:37:20+00:00