is 2 966241 - 1
has 290868 decimal digits
takes 0.023 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L695591638CCB82E1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26730.752170.1493 %100000005000000001.290310.6155 %32.042473.3181 %
Target2440.000054.5455 %1600032500000.006818.4100 %0.006862.9136 %
Difference+23+30.7521+15.6038 %+9984000+496750000+1.2836-7.7945 %+32.0357+10.4044 %

Known prime factors (2 factors, 182.0 bits, 0.01883393% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
96624123262567028039295562562492580.9441203766297851120764
22 × 1451 × 207402876955741
2016-12-301451207402876955741253,422397,332742,106
966241260086081832816711273295706751931101.0371345865481969905599499999
61 × 9157 × 2409453812043649487
2014-04-19915724094538120436494871.329e+114.616e+98.621e+9

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-01-08ANONYMOUSv4_computers2000200000--0.00012.275%
2002-03-03ANONYMOUSv4_computers4096409600--0.00115.203%
2002-05-05ANONYMOUSv4_computers8192819200--0.00218.004%
2002-05-11Jossv4_computers50005000--0.0005.001%
2002-05-11Jossv4_computers60006000--0.0005.445%
2002-05-25ANONYMOUSv4_computers163841638400--0.00420.768%
2002-08-03ANONYMOUSv4_computers32768327680012--0.00723.486%
2003-01-16ANONYMOUSv4_computers65536655360012--0.01526.152%
2003-09-29ANONYMOUSv4_computers1310721310720012--0.02928.759%
2011-06-04JossManual testing200000200000--0.00715.653%
2011-07-14JossManual testing208410208410--0.00715.781%
2011-09-24JossManual testing347350347350--0.01217.374%
2012-02-06JossManual testing694701694701--0.02419.533%
2012-07-14JossManual testing966271966271--0.03420.556%
2013-10-18David Campeaui5-2500k9950003184000012--0.09432.622%
2014-03-12alpertronManual testing1000000050000000012--1.29041.414%
2016-03-17alpertronManual testing20000050000006---26.336%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-06-28ANONYMOUSv4_computers212550.005
2000-11-15ANONYMOUSv4_computers212560.010
2001-11-24ANONYMOUSv4_computers212570.020
2003-08-25ANONYMOUSv4_computers212580.040
2022-03-07LordJuliusManual testing258260
2010-05-14Architects Cubedm1_tt2602610.159
2014-03-09lycornManual testing2612620.318


ECM factoring results:
Total ECM effort:16.311 GHz-days
Estimated T-Level:25.645
DigitsB1CompleteFacMiss
201100014.8270.000%
25500001.59420.315%
302500000.12987.906%
3510000000.00999.144%


ECM Summary

B1B2factorcurvesGHz-days
10.170
50000500001502.719
5000050000002256.256
500005000000330.935
25000025000000446.231


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-11-02ANONYMOUSv4_computers695591638CCB82E10.023


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-2
2600860818328167112732957067519
2326256702803929556256249
EC4CA602C7F5AE34
2017-10-05Oliver KruseManual testing
2600860818328167112732957067519
2326256702803929556256249
EC4CA602C7F5AE34
2017-10-15Oliver KruseThreadripper-PC
2326256702803929556256249
2600860818328167112732957067519
EC4CA602C7F5AE34
2017-12-23ATHec2-1xh
2326256702803929556256249
2600860818328167112732957067519
EC4CA602C7F5AE34
2020-04-24Oliver KruseAddPrpType5
2326256702803929556256249
2600860818328167112732957067519
F4D94CBA6790CB4D


CERT results:
No CERT results for M966241


P-1 factor-bounds graph:
B1 = 10000000, B2 = 500000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 995000, B2 = 31840000 (P-1 stage 2)
B1 = 995000 (P-1 stage 1)
B1 = 966271 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 694701 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 347350 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 208410 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 8192, B2 = 819200 (P-1 stage 2)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 8192 (P-1 stage 1)
B1 = 6000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
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TF factor-bounds graph:
262
261
260
258
257
256
255
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=25.64 ~= 69-bit
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Last modified: 2024-03-03T02:29:32+00:00