is 2 1317223 - 1
has 396524 decimal digits
takes 0.042 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LCA223FBF1B649A24double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26722.558068.6567 %40816791510221340.55558.7311 %23.113571.3933 %
Target2600.116665.0000 %55002000000.00070.9762 %0.117365.3417 %
Difference+7+22.4414+3.6567 %+4076179+150822134+0.5548+7.7550%+22.9962+6.0517 %

Known prime factors (1 factor, 84.6 bits, 0.00642030% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1317223287082015127774671241279612684.57010897244245195182260
22 × 5 × 11213 × 101749 × 477567449
2016-10-181017494775674495,304,8821.20022.2334

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-11-08eteov4_computers200000200000012--0.0145.907%
2014-06-11mikrMSI408167915102213412--0.55614.579%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-03ANONYMOUSv4_computers212570.015
2003-06-17ANONYMOUSv4_computers212580.029
2016-02-23Mark RoseManual testing2582600.087
2009-02-14Sturle Sundegollumilla.ifi2602610.117
2012-09-18AxelssonManual testing2612620.233
2013-01-07dbaughManual testing2622630.745
2015-04-10snme2pm1Manual testing2632654.327
2015-10-02ramgeisManual testing2652665.673


ECM factoring results:
Total ECM effort:20.695 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002489.452
50000500000030.116
250000350000005011.13


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-02MadPooManual testingCA223FBF1B649A240.042


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-3
28708201512777467124127961
B76CF26DE7DFB281
2017-10-22kkmrkkblmbrbkold
28708201512777467124127961
B76CF26DE7DFB281


CERT results:
No CERT results for M1317223


P-1 factor-bounds graph:
B1 = 4081679, B2 = 151022134 (P-1 stage 2)
B1 = 4081679 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
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105
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104
105
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107
108
109
TF factor-bounds graph:
266
265
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00