is 2 1450913 - 1
has 436769 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L9F5AD17D1655E704double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26720.479568.6567 %2500000625000000.31947.4073 %20.798870.9784 %
Target2600.105965.0000 %65004500000.00171.3967 %0.107665.4888 %
Difference+7+20.3736+3.6567 %+2493500+62050000+0.3177+6.0107%+20.6913+5.4896 %

Known prime factors (1 factor, 81.0 bits, 0.00558217% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
145091324051625345847390706243592580.992828844505006412883
37 × 61 × 1586911 × 231413629
2016-08-211586911231413629266,7760.78111.3037

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers15000243750--0.0022.395%
2010-07-23Rob_Deetwopc100000200000--0.0072.977%
2010-07-24Rob_Deetwopc200000300000--0.0133.533%
2010-07-25Rob_Deetwopc20000010000006--0.0165.077%
2010-07-26Rob_Deetwopc20000020000006--0.0195.981%
2010-07-27Rob_Deetwopc20000030000006--0.0236.515%
2010-07-28Rob_Deetwopc20000040000006--0.0266.896%
2010-07-29Rob_Deetwopc20000050000006--0.0307.192%
2014-11-17JossManual testing244237244237--0.0163.269%
2015-01-28JossManual testing325078325078--0.0213.645%
2015-01-30JossManual testing357585357585--0.0233.775%
2015-02-09alpertronManual testing5000001500000012--0.0849.444%
2015-05-22alpertronManual testing20000006000000012--0.33412.630%
2016-08-21Bruno Victal5820K.ECM2500000625000001222580.9920.31912.829%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-07-30ANONYMOUSv4_computers212580.026
2010-05-07Architects Cubeda3_bu22602610.106
2011-03-08GrunwalderGIMPManual testing212631.100
2016-02-23Mark RoseManual testing2582630.968
2015-03-25snme2pm1Manual testing2632653.928
2015-09-17ramgeisManual testing2652665.150


ECM factoring results:
Total ECM effort:30.538 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025113.51
250000400000005017.03


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-14ANONYMOUSv4_computers9F5AD17D1655E7040.055
2015-07-01MadPooManual testing9F5AD17D1655E7040.065


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-3
2405162534584739070624359
D6700C2907C89496
2017-10-27Chang Chia-Tchehomura
2405162534584739070624359
D6700C2907C89496


CERT results:
No CERT results for M1450913


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 357585 (P-1 stage 1)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 325078 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 244237 (P-1 stage 1)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
266
265
263
261
258
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00