is 2 1172207 - 1
has 352870 decimal digits
takes 0.036 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LAA1C682FD9AEEFB0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26725.348768.6567 %1215000352350000.13646.1766 %25.485170.5927 %
Target2600.131065.0000 %50001400000.00050.7985 %0.131665.2795 %
Difference+7+25.2177+3.6567 %+1210000+35095000+0.1359+5.3781%+25.3536+5.3132 %

Known prime factors (1 factor, 71.6 bits, 0.00610929% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
117220736126679364088405808392271.6141540968419574717
3 × 7 × 37 × 47 × 42196347643
2016-03-104742196347643407.84102.23190.93

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-05Jossv4_computers10001000--4.45000e-50.039%
2002-08-17Jossv4_computers30003000--0.0000.167%
2002-08-17Jossv4_computers40004000--0.0000.227%
2002-08-17Jossv4_computers20002000--8.89000e-50.103%
2002-08-24Jossv4_computers3276832768--0.0011.189%
2002-08-24Jossv4_computers50005000--0.0000.283%
2002-08-24Jossv4_computers60006000--0.0000.336%
2013-10-07David CampeauManual testing12150003523500012--0.14111.188%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-04ANONYMOUSv4_computers212570.016
2003-05-11ANONYMOUSv4_computers212580.033
2016-02-23Mark RoseManual testing2582600.098
2009-02-17Sturle Sundegolli.ifi2602610.131
2012-09-04AxelssonManual testing2612620.262
2012-10-13dbaughManual testing2622630.837
2014-12-31Matthias WurtingerManual testing2632641.675
2015-01-01lycornManual testing2642653.187
2015-09-23omylistManual testing2652666.375


ECM factoring results:
Total ECM effort:18.860 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028010.47
50000500000010.038
25000025000000448.355


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-10-03ANONYMOUSv4_computersAA1C682FD9AEEFB00.036


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-0
3612667936408840580839
4B12EC3D786B0DFD
2017-10-17Oliver KruseGTX-1
3612667936408840580839
4B12EC3D786B0DFD
2018-01-06ATHec2-1xh
3612667936408840580839
4B12EC3D786B0DFD


CERT results:
No CERT results for M1172207


P-1 factor-bounds graph:
B1 = 1215000, B2 = 35235000 (P-1 stage 2)
B1 = 1215000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 6000 (P-1 stage 1)
B1 = 5000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 3000 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
266
265
264
263
262
261
260
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