is 2 1448833 - 1
has 436143 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAFD32729A7BE9A41double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.508968.6567%500000150000000.07144.9277%20.580370.2012%1.5445%
PrimeNet2560.006662.5000%70001200000.00072.9037%0.007463.5889%1.0889%
GPU722600.106065.0000%6500900000.00061.3962%0.106665.4887%0.4887%
Difference+7+20.4029+3.6567%+493500+14910000+0.0708+3.5314%+20.4737+4.7125%+4.7125%

Known prime factors (2 factors, 135.6 bits, 0.00935827% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14488336255809014122160071859.118215891307491
190759 × 1131749
-19075911317490.06550.01340.0215
14488331044872631579944644715832476.46836059112112298127
3 × 29 × 58657 × 7066037353
2018-09-2258657706603735316,38621.31639.807

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
14488336536523627247360483849207030886230922908141135.586
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:14:28alpertronManual testing5000001500000012-
skipped known factor: 625580901412216007
--0.071--4.928%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--


ECM factoring results:

Old Calculation Method

Total ECM effort:26.434 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:26.434 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024911.79
50000500000020.095
250000400000005014.55


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00ANONYMOUSv4_computersAFD32729A7BE9A410.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T01:29:26Oliver KruseGTX-2
625580901412216007
ADF4DAB97E1888__no
2017-10-27T11:49:19Chang Chia-Tchehomura
625580901412216007
ADF4DAB97E1888__no
2018-09-23T12:03:22treborLaptop
625580901412216007
104487263157994464471583
8EE8220BF49D37__no
2018-09-23T12:10:42ANONYMOUS
625580901412216007
104487263157994464471583
8EE8220BF49D37__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2022-01-18T14:04:29+00:00