is 2 2320553 - 1
has 698557 decimal digits
takes 0.157 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
Actual26712.804767.1642 %50000005050000003.158210.9788 %15.962970.7692 %
Target2620.264764.5161 %1300010000000.00651.7821 %0.271365.1485 %
Difference+5+12.5399+2.6481 %+4987000+504000000+3.1517+9.1967%+15.6916+5.6207 %

Known prime factors (3 factors, 154.9 bits, 0.00667568% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
232055313923319823.7313
3
-134.819e-131.086e-71.994e-7
23205531250178799735455111856.79526937087835
5 × 7 × 19 × 1553 × 26083
2015-04-301553260830.00620.00030.0003
2320553246984117142149424512472374.3875321665076000191
37 × 43 × 97 × 46441 × 742513
2018-02-28464417425132,965.90.00830.0093

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-02-28alpertronlaptop2500000150000001222374.3870.1268.320%
2021-04-22ViliamF35000000505000000
skipped known factor: 13923319
skipped known factor: 125017879973545511
skipped known factor: 24698411714214942451247
---15.470%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2015-04-30TJAOIManual testing256257*
56.795
18
0.003


ECM factoring results:
Total ECM effort:21.040 GHz-days
Estimated T-Level:21.484
DigitsB1CompleteFacMiss
20110003.0814.592%
25500000.29774.326%
302500000.01998.102%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.539
50000389106905017.37
500004739242273.127


Lucas-Lehmer results:
No L-L results for M2320553


PRP results:
dateuseridcompidcofactorsres64
2017-10-11Oliver KruseGTX-1
13923319
125017879973545511
3A401D88CDA87990
2017-11-23storm55103570_Ivy_Bridge
13923319
125017879973545511
3A401D88CDA87990
2018-03-07Oliver KruseGTX-7
13923319
125017879973545511
24698411714214942451247
2B922A5416A08244
2018-03-08csabaofficeD18B894FE1BBCA__
2018-03-09kkmrkkblmbrbkc5.xlarge
13923319
125017879973545511
24698411714214942451247
2B922A5416A08244


CERT results:
No CERT results for M2320553


P-1 factor-bounds graph:
B1 = 5000000, B2 = 505000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
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105
106
107
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=21.48 ~= 55-bit
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JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00