is 2 1212769 - 1
has 365080 decimal digits
takes 0.037 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB88D7264FE8B8EE3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26724.500968.6567 %2500000625000000.25657.2725 %24.757470.9362 %
Target2600.126665.0000 %50001500000.00060.8278 %0.127265.2897 %
Difference+7+24.3742+3.6567 %+2495000+62350000+0.2560+6.4447%+24.6302+5.6464 %

Known prime factors (1 factor, 84.2 bits, 0.00694527% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1212769226866035849900958723533272684.2309353225381333995127
23 × 24019 × 16930845293371
2016-06-0324019169308452933713,230,51441,01876,610

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-08-31Jossv4_computers10001000--4.45000e-50.039%
2002-11-09Jossv4_computers50005000--0.0000.285%
2002-11-16Jossv4_computers1000010000--0.0000.525%
2003-09-21Xyzzyv4_computers1000010000006--0.0032.891%
2003-09-21Team Prime Ribv4_computers1000010000006--0.0032.891%
2013-11-13David Campeaui5-2500k12050003494500012--0.13511.205%
2016-08-27Bruno VictalManual testing25000006250000012---12.632%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-10ANONYMOUSv4_computers212570.016
2003-05-19ANONYMOUSv4_computers212580.032
2016-02-23Mark RoseManual testing2582600.095
2009-04-04Sturle Sundenouchcraft.ifi2602610.127
2011-05-09XyzzyManual testing2612620.253
2012-10-11dbaughManual testing2622630.809
2015-03-27omylistManual testing2632641.619
2015-04-06monstManual testing2642653.081
2015-09-16ramgeisManual testing2652666.162


ECM factoring results:
Total ECM effort:20.239 GHz-days
Estimated T-Level:25.687
DigitsB1CompleteFacMiss
201100015.2080.000%
25500001.66718.888%
302500000.13787.162%
3510000000.00999.076%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027810.47
50000500000030.111
25000035000000449.65


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-12MadPooManual testingB88D7264FE8B8EE30.038


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-3
22686603584990095872353327
E117F0F8AA3C6266
2017-10-18Oliver KruseThreadripper-PC
22686603584990095872353327
E117F0F8AA3C6266
2018-01-03ATHec2-8x
22686603584990095872353327
E117F0F8AA3C6266


CERT results:
No CERT results for M1212769


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 1205000, B2 = 34945000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 1205000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
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107
102
103
104
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109
1010
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1014
TF factor-bounds graph:
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265
264
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.69 ~= 69-bit
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Last modified: 2024-03-03T02:29:32+00:00