is 2 1204649 - 1
has 362636 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-LFE91A67D2FF064BAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26724.666068.6567 %42184751560835650.55558.7199 %25.221571.3898 %
Target2600.127565.0000 %50001500000.00060.8265 %0.128165.2893 %
Difference+7+24.5385+3.6567 %+4213475+155933565+0.5549+7.8934%+25.0935+6.1005 %

Known prime factors (1 factor, 76.6 bits, 0.00636253% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12046491182503472908338791138072476.64649080830719501647
32 × 11 × 41 × 364141 × 33206513
2014-12-273641413320651319,8730.09580.1503

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-08-17Jossv4_computers10001000--4.45000e-50.039%
2002-10-07Jossv4_computers50005000--0.0000.285%
2002-10-19Jossv4_computers80008000--0.0000.436%
2002-11-09Jossv4_computers1000010000--0.0000.524%
2003-02-09ANONYMOUSv4_computers204820480012--0.0010.984%
2003-02-16ANONYMOUSv4_computers409640960012--0.0011.682%
2003-09-21Team Prime Ribv4_computers1000010000006--0.0032.887%
2003-09-21Xyzzyv4_computers1000010000006--0.0032.887%
2014-04-17JossManual testing200000200000--0.0092.935%
2014-09-17ANONYMOUSManual testing253280253280--0.0123.226%
2014-12-27mikrMSI42184751560835651222476.6460.55614.554%
2016-03-17alpertronManual testing3000001000000012---8.282%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-10ANONYMOUSv4_computers212570.016
2003-02-16ANONYMOUSv4_computers212580.032
2003-03-16ANONYMOUSv4_computers212590.032
2022-03-07LordJuliusManual testing259260
2009-02-15Sturle Sundedietrich.ifi2602610.127
2011-05-09XyzzyManual testing2612620.255
2012-10-07dbaughManual testing2622630.815


ECM factoring results:
Total ECM effort:18.948 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028110.56
25000025000000448.389


Lucas-Lehmer results:
No L-L results for M1204649


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-0
118250347290833879113807
FAB5A971EC71F985
2017-10-18Oliver KruseThreadripper-PC
118250347290833879113807
FAB5A971EC71F985
2018-01-03ATHec2-8x
118250347290833879113807
FAB5A971EC71F985


CERT results:
No CERT results for M1204649


P-1 factor-bounds graph:
B1 = 4218475, B2 = 156083565 (P-1 stage 2)
B1 = 4218475 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 253280 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 10000, B2 = 1000000 (P-1 stage 2)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 8000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
263
262
261
260
259
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00