is 2 1352543 - 1
has 407157 decimal digits
takes 0.052 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF4D6D1E2249D8701double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26721.968968.6567 %42580861631380920.71508.8793 %22.683971.4398 %
Target2600.113665.0000 %55002000000.00090.9820 %0.114465.3437 %
Difference+7+21.8554+3.6567 %+4252586+162938092+0.7141+7.8972%+22.5694+6.0961 %

Known prime factors (1 factor, 75.5 bits, 0.00558501% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1352543549147303735394064203672375.54020300548808259481
23 × 1381 × 639125674787
2016-05-1813816391256747875,657.41,927.83,600.5

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-21Xyzzyv4_computers15000217500--0.0012.291%
2003-09-21Team Prime Ribv4_computers15000217500--0.0012.291%
2014-04-28ANONYMOUSManual testing175000175000--0.0112.827%
2014-07-27mikrMSI425808616313809212--0.71514.774%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-04ANONYMOUSv4_computers212570.014
2003-06-30ANONYMOUSv4_computers212580.028
2016-02-23Mark RoseManual testing2582600.085
2009-02-20Sturle Sundegibus.ifi2602610.114
2011-05-09XyzzyManual testing2612620.227
2013-01-14dbaughManual testing2622630.726
2015-04-14snme2pm1Manual testing2632641.452
2015-04-14snme2pm1Manual testing2642652.762
2015-09-18ramgeisManual testing2652665.525


ECM factoring results:
Total ECM effort:29.011 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024913.16
50000500000020.094
250000350000005015.76


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-09-29ANONYMOUSv4_computersF4D6D1E2249D87010.052


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-2
54914730373539406420367
E4F612735D863DC1
2017-10-24kkmrkkblmbrbkc4.xlarge
54914730373539406420367
E4F612735D863DC1


CERT results:
No CERT results for M1352543


P-1 factor-bounds graph:
B1 = 4258086, B2 = 163138092 (P-1 stage 2)
B1 = 4258086 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
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=25.7 ~= 69-bit
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Last modified: 2024-02-09T03:30:02+00:00