is 2 1148963 - 1
has 345873 decimal digits
takes 0.034 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LEFF007F73929AB12double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26725.861568.6567 %300000100000000.03564.1380 %25.897169.9537 %
Target2600.133765.0000 %50001300000.00050.7706 %0.134265.2697 %
Difference+7+25.7278+3.6567 %+295000+9870000+0.0351+3.3673%+25.7629+4.6840 %

Known prime factors (1 factor, 62.6 bits, 0.00544578% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
114896368461460023038114311962.5702979271744305
3 × 5 × 388931 × 510677
2008-06-163889315106770.53470.01700.0340

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-05Jossv4_computers10001000--4.30000e-50.038%
2002-05-05Jossv4_computers20002000--8.60000e-50.102%
2002-05-05Jossv4_computers30003000--0.0000.166%
2002-05-11Jossv4_computers50005000--0.0000.281%
2002-05-11Jossv4_computers40004000--0.0000.225%
2002-08-10Jossv4_computers70007000--0.0000.384%
2002-08-10Jossv4_computers90009000--0.0000.475%
2002-08-10Jossv4_computers80008000--0.0000.431%
2002-08-10Jossv4_computers60006000--0.0000.334%
2002-08-10Jossv4_computers1000010000--0.0000.518%
2003-09-21Team Prime Ribv4_computers1000010000006--0.0032.862%
2003-09-21Xyzzyv4_computers1000010000006--0.0032.862%
2016-03-17alpertronManual testing3000001000000012---8.238%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-07-12ANONYMOUSv4_computers212560.008
2001-11-14ANONYMOUSv4_computers212570.017
2003-04-27ANONYMOUSv4_computers212580.033
2022-04-12LordJuliusManual testing21261
2022-04-12LordJuliusManual testing261262
2022-04-12LordJuliusManual testing263264


ECM factoring results:
Total ECM effort:19.463 GHz-days
Estimated T-Level:25.698
DigitsB1CompleteFacMiss
201100015.1690.000%
25500001.68418.564%
302500000.14086.967%
3510000000.00999.062%


ECM Summary

B1B2factorcurvesGHz-days
10.028
5000050000002809.91
25000040000000449.53


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-07-13ANONYMOUSv4_computersEFF007F73929AB120.034


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-0
6846146002303811431
45B1156983550E2D
2017-10-17Oliver KruseThreadripper-PC
6846146002303811431
45B1156983550E2D
2018-01-07ATHec2-1xh
6846146002303811431
45B1156983550E2D


CERT results:
No CERT results for M1148963


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 9000 (P-1 stage 1)
B1 = 8000 (P-1 stage 1)
B1 = 7000 (P-1 stage 1)
B1 = 6000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 3000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
TF factor-bounds graph:
264
262
261
258
257
256
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
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Last modified: 2024-02-09T03:30:02+00:00