is 2 1398227 - 1
has 420909 decimal digits
takes 0.053 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L90DFC12C8CD4397Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26721.251168.6567 %31069001118490000.50008.2302 %21.751171.2363 %
Target2600.109865.0000 %60003250000.00131.2120 %0.111165.4242 %
Difference+7+21.1413+3.6567 %+3100900+111524000+0.4987+7.0182%+21.6400+5.8121 %

Known prime factors (2 factors, 141.1 bits, 0.01009006% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13982279558466512230726894472169.695341806677750849
3 × 243863 × 467211341
2015-01-2824386346721134185.3841.42202.6321
139822730868246777792462369132271.3871103835313500328
23 × 137979414187541
2019-01-048137979414187541341.92416,182777,313

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-21Xyzzyv4_computers15000228750--0.0012.338%
2003-09-21Team Prime Ribv4_computers15000228750--0.0012.338%
2014-04-16JossManual testing110000110000--0.0072.320%
2014-04-17JossManual testing120000120000--0.0082.413%
2014-04-23ANONYMOUSManual testing200000200000--0.0133.002%
2014-06-14Denial140Manual testing24646951758496--0.0337.358%
2014-06-14Denial140Manual testing21083426957528612--0.37512.878%
2014-10-04mikrMSI310690011184900012--0.50013.949%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-25ANONYMOUSv4_computers212580.027
2022-03-07LordJuliusManual testing258260
2009-02-15Sturle Sundegibus.ifi2602610.110
2012-07-04Grant McCrackenthumper2612620.220
2013-01-27dbaughManual testing2622630.702


ECM factoring results:
Total ECM effort:29.308 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
500005000000703.507
50000500000020.094
5000050000001799.85
250000350000005015.86


Lucas-Lehmer results:
No L-L results for M1398227


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-1
955846651223072689447
A564025C3BB1FE8F
2017-10-25kkmrkkblmbrbkc4.xlarge
955846651223072689447
A564025C3BB1FE8F
2019-01-04ATHec2-PRPCF
955846651223072689447
3086824677779246236913
5B3BC0775EE3E5C7
2019-01-06Oliver KruseGTX-2
955846651223072689447
3086824677779246236913
5B3BC0775EE3E5C7


CERT results:
No CERT results for M1398227


P-1 factor-bounds graph:
B1 = 3106900, B2 = 111849000 (P-1 stage 2)
B1 = 2108342, B2 = 69575286 (P-1 stage 2)
B1 = 3106900 (P-1 stage 1)
B1 = 2108342 (P-1 stage 1)
B1 = 246469, B2 = 5175849 (P-1 stage 2)
B1 = 246469 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 120000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
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Last modified: 2024-02-09T03:30:02+00:00