is 2 1997707 - 1
has 601370 decimal digits
takes 0.131 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
Actual26714.874068.6567%----14.874068.6567%0.0000%
PrimeNet2580.019263.7931%80001400000.00142.4783%0.020764.6904%0.8973%
GPU722620.307566.1290%80001100000.00131.2363%0.308866.5478%0.4188%
Difference+5+14.5665+2.5277%-8000-110000-0.0013-1.2363%+14.5652+2.1089%+2.1089%

Known prime factors (4 factors, 162.2 bits, 0.00811914% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
199770719977071824.2525
5
-151.120e-121.161e-71.940e-7
1997707115867007926.78829
29
2008-07-151294.503e-122.408e-72.408e-7
199770784862593371032.9822124
22 × 32 × 59
2008-07-159594.181e-101.118e-61.746e-6
19977073410676291629377195266072478.17485364778008721429
32 × 101 × 93910646874281
2022-05-301019391064687428143,836487,795911,066

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
199770723146834253964971651.040
19977071695306052996619271857.234
19977079832774700039943591859.770
1997707196430038309701655933424892684.022
1997707681353224358967739156111442809731102.426
19977073951848537569550888895340995524932104.962
1997707289438835253243371668215587367955934111.157
199770778946358816273085545575338636811609567939129.214
19977075782140162011345816095331232156358139168941135.409
199770733536411550359396517784737139072057840991342137.945
1997707669959274626749739752938456543579373605589910482349162.197
P-1 results:
No P-1 results for M1997707


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:49:00J FeitsmaManual testing??26.78892.80910e-140.2866.11782e-14
2008-07-15T07:49:00J FeitsmaManual testing??32.982101.31675e-100.2862.86770e-10


ECM factoring results:

Old Calculation Method

Total ECM effort:4.331 GHz-days
Estimated T-Level:2.450
DigitsB1CurvesCompleteFacMiss
201100049 / 1000.49061.112%
255000049 / 2800.17583.919%

New Calculation Method

Total ECM effort:4.331 GHz-days
Estimated T-Level:2.450
DigitsB1CompleteFacMiss
20110001.93314.476%
25500000.17983.620%
302500000.01198.875%


ECM Summary

B1B2factorcurvesGHz-days
500005000000342.875
50000660000010.096
50000675000070.676
50000693120670.684


Lucas-Lehmer results:
No L-L results for M1997707


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T17:52:56Oliver KruseGTX-1
19977071
115867007
8486259337
AF530111E709AF__no
2017-11-13T07:25:14Chang Chia-Tcheexbpc13
19977071
115867007
8486259337
AF530111E709AF__no
2022-05-30T21:00:42SRJ2877LTOS
19977071
115867007
8486259337
341067629162937719526607
D3558DE89E223A__no


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-07-26T06:12:56+00:00