is 2 4273 - 1
has 1287 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676,953.877380.5970%10000000002010000000000.857216.8111%6,954.734583.8589%16.3589%
PrimeNet2400.000067.5000%500100000.00002.4317%0.000068.2903%0.7903%
GPU722440.000570.4545%500100000.00000.9695%0.000570.7410%0.2864%
Difference+23+6,953.8767+10.1425%+999999500+200999990000+0.8572+15.8416%+6,954.7339+13.1179%+13.1179%

Known prime factors (5 factors, 380.0 bits, 8.89235604% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
427325639514.6463
3
-135.111e-137.991e-111.466e-10
4273719086079929.42284143
84143
-1841432.030e-83.304e-76.170e-7
42731327670353162609477132166.84715535576330009472
27 × 11 × 59 × 187013389951
-1281870133899514,888.60.73421.3713
4273581914315075037620149949566232995.5556809200972092647088110807
43 × 2897 × 54661205032412416117
-2897546612050324124161172.458e+12214,592,299400,798,655
427316937472485366180815044482979818421310092932459932
943
53173.5001981918147129204401479579098972434040497651820727
23 × 107830127681 × 5278569365895061 × 151391511755474276189
2020-10-0152785693658950611513915117554742761893.176e+13594,701,6831.110e+9

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4273184366479794811444.068
427334040140184736144384136072581.494
4273954709268460246098317651873272996.269
4273149197011242088895430245569285709734110.201
4273244777909340522497147662763787695334110.915
42734184464831412793930511186256280815121738124.976
4273107285493812592623584376304424783818905266343139.622
4273772590384206053201141577397656443830350530605319949162.402
427319808444860658998024068902898513563366357254189796
9161
54177.048
427343425985705230350991692549911956450396947269534022
0725577
57188.147
427355555899005183432447429521475579598305050424854898
34316721
58191.824
427312179500677672351841495361476539864711844769928225
004584800497
62202.922
427314243976945938980245196455011123853209431878428547
3862046409719
63206.470
427331227021787484142886409957289700559134698805618976
0892549699942583
66217.568
427322487380076328098161721092667437435911713263933460
59012815697953609209359
73240.348
427357655393777697610876836709490042841934041637398999
607029581679832586518755401
77254.994
427398561577004241562598098816967940124939078818270081
8922200498194567129165773731489
81269.055
427316170361966069492824639128417823236767567681134204
29265628250991109170256253413361
82269.770
427325270202728117494234526555682410168633130418216266
296346298573210506624681272701646471
86283.701
427341459191044805572653092261350456996748366777659986
385941442727161048016200081265162679
86284.416
427370874257948036631617499931148014733149212301301786
7508854162298577856014102773577623841631
90298.477
427318171450995297111980410807347039497432126541930765
105059511867173237650345581011756697675577209
95313.123
427313085728374948512441365740573899846831995919383695
29549254578050918636222163475484459485186315306346
57
102335.903
427333550498980530491048417622257421817292554337707856
36811333812664750291410004934794605674069193813941
970823
106350.549
427394097651080007676383444077942168505971205174136215
46566481119034345444690229064831325966369860580984
3883639903
110365.324
427324125696760403168147951227143592583245957294596784
28324180094109215828564127829932103664517568554358
587332643473017
115379.970
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-07-05T10:47:59ViliamF31000000000201000000000---0.857--16.811%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-10-25T00:00:00Carsten Kossendeyv4_computers??44.068140.0004.98013e-70.000


ECM factoring results:

Old Calculation Method

Total ECM effort:17.937 GHz-days
Estimated T-Level:33.807
DigitsB1CurvesCompleteFacMiss
20110001304 / 10013.0400.000%
25500001304 / 2804.6570.941%
302500001304 / 6402.03813.015%
3510000001203 / 15800.76146.690%
4030000001203 / 47000.25677.415%
4511000000418 / 97000.04395.782%
5044000000201 / 171000.01298.831%

New Calculation Method

Total ECM effort:17.937 GHz-days
Estimated T-Level:33.807
DigitsB1CompleteFacMiss
2011000288.5170.000%
255000082.8630.000%
3025000019.1560.000%
3510000003.8122.211%
4030000000.66451.491%
45110000000.10590.009%
50440000000.01598.484%
551100000000.00299.793%


ECM Summary

B1B2factorcurvesGHz-days
30000003000000007852.442
11000000110000001010.781
1100000011000000002172.475
4400000044000000002009.125
11000000090051415378213.114


Lucas-Lehmer results:
Exponent "4273" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T18:33:48Oliver KruseOliver-PC0EA99051603194__?
2017-09-21T19:21:11Oliver KruseManual testing0EA99051603194__?
2017-10-02T09:55:58kkmrkkblmbrbkManual testing
25639
719086079
132767035316260947713
58191431507503762014994956623
0EA99051603194__no
2017-12-07T02:44:27ATHManual testing
25639
719086079
132767035316260947713
58191431507503762014994956623
0EA99051603194__no
2020-04-17T12:32:21Oliver KruseIOS-1
25639
719086079
132767035316260947713
58191431507503762014994956623
8AFA05C962E70F__no
2020-10-01T03:44:26M Millercruncher
25639
719086079
132767035316260947713
58191431507503762014994956623
16937472485366180815044482979818421310092932459932
943
8AFA05C962E70FEFno
2020-10-01T05:09:24Team_InspectorPurple
25639
719086079
132767035316260947713
58191431507503762014994956623
16937472485366180815044482979818421310092932459932
943
8AFA05C962E70FEFno


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 201000000000 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-07-05T10:47:59+00:00