is 2 3482443 - 1
has 1048320 decimal digits
takes 0.366 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L78BB319045FB3EACdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27068.615868.5714%920000017701770450148.199814.0303%216.815672.9810%
Target2641.022165.6250%1900018000000.01771.8870%1.039766.2737%
Difference+6+67.5937+2.9464%+9181000+17699970450+148.1821+12.1433%+215.7758+6.7073%

Known prime factors (1 factor, 128.5 bits, 0.00369029% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
348244348538474671804313926982554160469963267939128.51269690264380212847600064888586073
29 × 853 × 333679 × 825101 × 2289247 × 4469885933
2023-05-05228924744698859335.407e+1037.41769.269

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-07Carsten Kossendeyleela20000240000---0.005--0.697%
2011-11-14harleeP4_260060000990000---0.017--1.482%
2014-08-21Jocelyn LaroucheManual testing7843178431---0.012--0.563%
2014-09-28HBendtzHAL900750000010000000---0.155--3.772%
2021-11-15Aaron HavilandManual testing15000003000000012---0.465--5.279%
2022-02-08mikrMSI5000000405000000---4.080--8.856%
2023-05-05Sid & AndyPterodactyl92000001770177045039128.512148.20.732296.414.030%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23Mark RoseManual testing21260--0.044--
2009-03-20S485122USB-Z260261--0.044--
2011-07-18markroldgamer261262--0.088--
2012-08-18GrunwalderGIMPManual testing21263--0.458--
2016-02-23Mark RoseManual testing262263--0.282--
2015-02-07VictordeHollanderManual testing263264--0.564--
2015-02-07VictordeHollanderManual testing264265--1.073--
2016-01-05ramgeisManual testing265266--2.146--
2017-02-18Gordon SpenceManual testing266267--4.292--
2018-10-22TJAOIManual testing267268--8.583--
2021-01-11axnManual testing268269--17.17--
2022-03-30TJAOIManual testing269270--34.33--


ECM factoring results:
Total ECM effort:12.117 GHz-days
Estimated T-Level:21.394
DigitsB1CompleteFacMiss
20110003.0034.963%
25500000.27975.676%
302500000.01898.252%


ECM Summary

B1B2factorcurvesGHz-days
50000470000071.003
500005000000578.394
50000700000071.218
500001644885351.502


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01Alexey Khlyamkov78BB319045FB3EAC0.366
1999-08-16ANONYMOUSv4_computers78BB319045FB3EAC0.366


PRP results:
dateuseridcompidcofactorsres64PRP
2023-05-05Naegi Makoto5950X
485384746718043139269825541604699632679
C38A071B09E9575Ano
2023-05-05ryumsipser
485384746718043139269825541604699632679
141DD05115BF9281no
2023-05-05ryumsipser
485384746718043139269825541604699632679
141DD05115BF9281no


P-1 factor-bounds graph:
B1 = 9200000, B2 = 17701770450 (P-1 stage 2)
B1 = 5000000, B2 = 405000000 (P-1 stage 2)
B1 = 9200000 (P-1 stage 1)
B1 = 5000000 (P-1 stage 1)
B1 = 1500000, B2 = 30000000 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 60000, B2 = 990000 (P-1 stage 2)
B1 = 78431 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 20000, B2 = 240000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
270
269
268
267
266
265
264
263
262
261
260
this exponent TF target: 64
TF double-checked to: 67.9
ECM T-Level=21.39 ~= 54-bit
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2023-09-25T11:53:03+00:00