is 2 1946657 - 1
has 586003 decimal digits
takes 0.106 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6AE3709E19399C26double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.264168.6567%500000150000000.10155.1064%15.365570.2572%1.6005%
PrimeNet2580.019763.7931%80001400000.00122.4659%0.020964.6859%0.8928%
GPU722620.315666.1290%8000900000.00101.1527%0.316666.5195%0.3904%
Difference+5+14.9485+2.5277%+492000+14910000+0.1005+3.9537%+15.0490+3.7378%+3.7378%

Known prime factors (3 factors, 205.6 bits, 0.01055945% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
194665721685849979518249931960.911557002337328
24 × 32 × 44059 × 87793
2015-09-2944059877930.11660.00370.0071
194665738837712762308070564972271.718997548945764664
23 × 3 × 9151 × 4542076211
2009-08-1291514542076211355.3519.46736.357
194665789773054160927874101032272.9272305826197448443
23 × 1865573 × 53738617
2022-04-14186557353738617636.230.36910.4302

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1946657842228812511034145973311456844360762952140132.629
19466571946804984737048480229123148866277610427941133.838
19466573486580091297242133249541567818585342958919144144.645
194665775609452801447036286341675554987921625469455669285
184716450663
62205.556
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-09-29T11:26:51alpertronManual testing50000015000000121960.9110.0390.2110.0795.106%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21258--0.020--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.809 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:20.809 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
201100010.5010.003%
25500000.99337.041%
302500000.06393.860%
3510000000.00399.702%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000241.670
50000585000070.520
50000675000070.555
50000750000019115.96
500007500000242.005
70000730000010.099


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersEF38711A78E11A__0.106
1999-05-23T00:00:00dennisv4_computers6AE3709E19399C260.106


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T04:32:12Oliver KruseGTX-2
2168584997951824993
3883771276230807056497
EF5FE7BF84E7B15Eno
2017-10-05T21:33:46Oliver KruseManual testing
2168584997951824993
3883771276230807056497
EF5FE7BF84E7B1__no
2017-11-15T15:35:59kkmrkkblmbrbkc4.xlarge
2168584997951824993
3883771276230807056497
EF5FE7BF84E7B1__no
2022-04-20T11:08:24Poaooffice-CN2
2168584997951824993
3883771276230807056497
8977305416092787410103
3CC5EFDE2B799424no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2022-04-28T10:18:56+00:00