is 2 847789 - 1
has 255210 decimal digits
takes 0.021 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
Actual26735.048770.1493 %62500001007011005019.499614.1283 %54.548374.3667 %
Target2440.000054.5455 %1400027500000.005717.5638 %0.005762.5290 %
Difference+23+35.0487+15.6038 %+6236000+10067360050+19.4939-3.4355 %+54.5426+11.8377 %

Known prime factors (6 factors, 354.5 bits, 0.04181060% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
84778945780607825.44827
33
-27275.303e-129.494e-71.932e-6
847789313471661372231444.83318487599
3 × 13 × 109 × 4349
2008-08-2610943494.547e-61.196e-51.555e-5
8477893030581029185771548.107178734392
23 × 61 × 366259
2014-03-26613662594.856e-50.00070.0013
8477896419425283549453831859.155378598052319
3 × 59 × 15473 × 138239
2014-09-23154731382390.12430.00080.0011
84778962763550533966769797132272.4103701602081058304
29 × 3 × 29 × 83099903041
2016-01-15512830999030411,851.9159.20297.34
8477892891985833135851605480309082019932104.51217056047159941044325181791
349 × 133877 × 365045491762518367
2016-01-151338773650454917625183671.664e+11699,335,9011.306e+9

57 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-09-23alpertronManual testing300000100000001221859.1550.02928.352%
2023-02-09Kevin_961125000002563871310
skipped known factor: 45780607
skipped known factor: 31347166137223
skipped known factor: 303058102918577
skipped known factor: 641942528354945383
--4.99545.126%
2023-02-12Kevin_9611625000010070110050
skipped known factor: 45780607
skipped known factor: 31347166137223
skipped known factor: 303058102918577
skipped known factor: 641942528354945383
--19.5049.289%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-08-26ANONYMOUSManual testing??
44.833
14
2014-03-26TJAOIManual testing??
48.107
15


ECM factoring results:
Total ECM effort:13.980 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002306.418
500005000000300.837
500005000000210.586
25000025000000446.139


Lucas-Lehmer results:
No L-L results for M847789


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-1
45780607
31347166137223
303058102918577
641942528354945383
6276355053396676979713
28919858331358516054803090820199
7EAE49526CA87CB1
2017-09-30alpertronManual testing
28919858331358516054803090820199
303058102918577
31347166137223
45780607
6276355053396676979713
641942528354945383
7EAE49526CA87CB1
2017-10-14Oliver KruseThreadripper-PC
45780607
31347166137223
303058102918577
641942528354945383
6276355053396676979713
28919858331358516054803090820199
7EAE49526CA87CB1
2020-04-21Oliver KruseAddPrpType5
45780607
31347166137223
303058102918577
641942528354945383
6276355053396676979713
28919858331358516054803090820199
0D0C570FC174D9D8


CERT results:
No CERT results for M847789


P-1 factor-bounds graph:
B1 = 6250000, B2 = 10070110050 (P-1 stage 2)
B1 = 2500000, B2 = 2563871310 (P-1 stage 2)
B1 = 6250000 (P-1 stage 1)
B1 = 2500000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
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260
270
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290
2100
2110
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00