is 2 17196787 - 1
has 5176749 decimal digits
takes 9.793 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L75AA2A0054AB998Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual274222.475666.2162 %4000000200111505093.14529.0803 %315.620869.2839 %
Target2696.942463.7681 %120000160000000.81353.3007 %7.755964.9640 %
Difference+5+215.5332+2.4481 %+3880000+1985115050+92.3318+5.7796%+307.8650+4.3199 %

Known prime factors:
No known factors for M17196787

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2004-12-13James Heinrichv4_computers10000020250006--0.1692.886%
2006-09-04James Heinrichv4_computers10000020250006--0.1692.886%
2022-08-22alpertronManual testing1000000501393750--26.529.878%
2022-11-07alpertronManual testing40000002001115050--105.912.964%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-02-18Net_Forcev4_computers212580.002
2001-03-25Net_Forcev4_computers212590.002
2001-08-12ANONYMOUSv4_computers212650.217
2016-03-16Mark RoseManual testing265266
2014-09-09NesowaManual testing2662670.869
2017-12-17ramgeisManual testing2672695.215
2020-03-21lycornManual testing2692706.953
2021-09-10SRBaseManual testing27027113.91
2021-09-19ANONYMOUSManual testing27127227.81
2021-11-30ANONYMOUSManual testing27227355.62
2022-01-11ANONYMOUSManual testing273274111.2
2022-01-11TheJudgerManual testing273274


ECM factoring results:
Total ECM effort:0.866 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.866


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-10-31curtiscv4_computers75AA2A0054AB998F9.79
2006-05-29Team Prime Ribv4_computers75AA2A0054AB998F9.79


PRP results:
No PRP results for M17196787


CERT results:
No CERT results for M17196787


P-1 factor-bounds graph:
B1 = 4000000, B2 = 2001115050 (P-1 stage 2)
B1 = 1000000, B2 = 501393750 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 100000, B2 = 2025000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
109
1010
TF factor-bounds graph:
274
273
272
271
270
269
267
266
265
259
258
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
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Last modified: 2024-03-13T02:15:48+00:00