is 2 9212927 - 1
has 2773368 decimal digits
takes 2.546 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.225264.1791 %1000000760000002.03848.5437 %5.263667.2395 %
Target2686.469764.7059 %6000065000000.16472.4088 %6.634465.5561 %
Difference-1-3.2445-0.5268 %+940000+69500000+1.8737+6.1349%-1.3708+1.6835 %

Known prime factors (4 factors, 207.4 bits, 0.00225140% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
92129272785989124811238.01915120
24 × 33 × 5 × 7
-27275.059e-91.082e-52.202e-5
921292754454479101831342.308295533
32 × 7 × 4691
2008-09-30946911.252e-70.00010.0002
92129273052732403728299191858.08316567657617
3 × 7 × 149 × 347 × 15259
2015-08-07347152590.00450.00050.0006
92129275939687739733460035032169.00932235617083113
34 × 19 × 232 × 139 × 284857
2021-03-2652928485713.5570.00640.0116

11 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-03-26ViliamF310000007600000022169.0092.0387.850%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-30markrManual testing??
42.308
13
2015-08-07TJAOIManual testing258259*
58.083
18
0.000


ECM factoring results:
No ECM results for M9212927


Lucas-Lehmer results:
No L-L results for M9212927


PRP results:
dateuseridcompidcofactorsres64
2019-07-31Niels_Mache_NextcloudSuperDry-X
278598912481
5445447910183
305273240372829919
024BD5C5CBF46081
2020-11-02kutensterra
278598912481
5445447910183
305273240372829919
024BD5C5CBF46081
2021-03-28Joe S.11600k
278598912481
5445447910183
305273240372829919
593968773973346003503
024BD5C5CBF46081


CERT results:
dateuseridcompid
2020-11-02Ben Deloi-057806e89c3fda116
2021-03-28curtiscwcm220a-13l


P-1 factor-bounds graph:
B1 = 1000000, B2 = 76000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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108
TF factor-bounds graph:
this exponent TF target: 68
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00