is 2 1198261 - 1
has 360713 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-L0BF4704B047D4E51double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26724.797568.6567 %89500003400000001.200010.2025 %25.997571.8545 %
Target2600.128265.0000 %50001400000.00050.8026 %0.128765.2809 %
Difference+7+24.6694+3.6567 %+8945000+339860000+1.1995+9.3999%+25.8688+6.5736 %

Known prime factors (1 factor, 77.3 bits, 0.00645125% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
11982611864108164936180765228072477.30377783895367377423
3 × 72 × 23 × 10181 × 2259717143
2016-03-3110181225971714325,5445.475010.225

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-11Jossv4_computers10001000--4.45000e-50.039%
2002-09-29Jossv4_computers50005000--0.0000.285%
2002-10-07Jossv4_computers80008000--0.0000.435%
2002-10-19Jossv4_computers1000010000--0.0000.523%
2003-02-09ANONYMOUSv4_computers204820480012--0.0010.983%
2003-02-16ANONYMOUSv4_computers409640960012--0.0011.680%
2003-09-21Team Prime Ribv4_computers1000010000006--0.0032.885%
2003-09-21Xyzzyv4_computers1000010000006--0.0032.885%
2014-04-17JossManual testing200000200000--0.0092.932%
2014-09-16ANONYMOUSManual testing253564253564--0.0123.225%
2015-05-26mikrColor895000034000000012--1.24016.393%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-27ANONYMOUSv4_computers212570.016
2003-02-16ANONYMOUSv4_computers212580.032
2003-03-16ANONYMOUSv4_computers212590.032
2016-02-23Mark RoseManual testing2592600.064
2009-02-15Sturle Sundemorovan.ifi2602610.128
2011-11-03Sebastian HornbostelManual testing2612620.256
2012-10-07dbaughManual testing2622630.819
2015-03-24omylistManual testing2632641.638
2015-04-04monstManual testing2642653.118
2015-10-02ramgeisManual testing2652666.236


ECM factoring results:
Total ECM effort:18.960 GHz-days
Estimated T-Level:25.657
DigitsB1CompleteFacMiss
201100014.7880.000%
25500001.61819.825%
302500000.13187.684%
3510000000.00999.130%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027810.46
500001274659920.120
25000025000000448.382


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-12MadPooManual testing0BF4704B047D4E510.038


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-0
186410816493618076522807
D8A6A4780CC6C97F
2017-10-17Oliver KruseThreadripper-PC
186410816493618076522807
D8A6A4780CC6C97F
2018-01-03ATHec2-8x
186410816493618076522807
D8A6A4780CC6C97F


CERT results:
No CERT results for M1198261


P-1 factor-bounds graph:
B1 = 8950000, B2 = 340000000 (P-1 stage 2)
B1 = 8950000 (P-1 stage 1)
B1 = 253564 (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
1010
TF factor-bounds graph:
266
265
264
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: 2024-02-09T03:30:02+00:00