is 2 1652897 - 1
has 497572 decimal digits
takes 0.078 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
Actual26717.976968.6567%500000150000000.08805.0067%18.064970.2260%1.5693%
PrimeNet2570.011663.1579%70001200000.00092.5643%0.012564.1026%0.9448%
GPU722610.185865.5738%7000700000.00071.1515%0.186665.9702%0.3964%
Difference+6+17.7910+3.0829%+493000+14930000+0.0873+3.8552%+17.8783+4.2558%+4.2558%

Known prime factors (2 factors, 112.8 bits, 0.00682594% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1652897448761535511135.38513575
3 × 52 × 181
-251815.368e-92.286e-63.472e-6
16528972050878256046634728398072477.44162038900670962399
59 × 22294763 × 47163847
2019-01-29222947634716384723,8851.61393.0963

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1652897920355275327558742884009695720465734112.826
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:17:55alpertronManual testing5000001500000012-
skipped known factor: 44876153551
--0.088--5.007%


Trial Factoring results:
No TF results for M1652897


ECM factoring results:

Old Calculation Method

Total ECM effort:14.876 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.876 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024914.76
50000500000020.119


Lucas-Lehmer results:
No L-L results for M1652897


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T19:01:52Oliver KruseGTX-3
44876153551
574C396758A61A__no
2017-11-02T09:04:03kkmrkkblmbrbkc4.xlarge
44876153551
574C396758A61A__no
2019-01-29T19:40:13Julianmartinpc
44876153551
205087825604663472839807
6D3C06318F1BE98Cno
2019-01-29T20:09:03ATHec2-PRPCFDC
44876153551
205087825604663472839807
6D3C06318F1BE98Cno


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
107
108
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2019-12-02T14:37:23+00:00