is 2 18824653 - 1
has 5666786 decimal digits
takes 12.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF5A6B03690E4D45Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27012.693564.2857 %37500079687500.72914.2960 %13.422665.8200 %
Target2696.342063.7681 %130000180000001.02013.4754 %7.362265.0273 %
Difference+1+6.3514+0.5176 %+245000-10031250-0.2911+0.8206%+6.0604+0.7927 %

Known prime factors (1 factor, 70.1 bits, 0.00037244% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1882465312743832753695947326312270.11033848785296855
32 × 5 × 29 × 12011 × 2159501
2019-07-2012011215950113.7250.11930.2031

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-12-13ANONYMOUSv4_computers275000275000--0.2541.727%
2019-07-20James Heinrichi3-810037500079687501222270.1100.6964.744%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-20Net_Forcev4_computers212580.002
2001-12-08Net_Forcev4_computers212590.002
2002-03-24ANONYMOUSv4_computers212660.397
2014-08-02NesowaManual testing2662670.794
2015-03-19NRManual testing2672694.764
2015-08-30ramgeisManual testing2692706.351


ECM factoring results:
Total ECM effort:0.925 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.925


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2006-01-15Team Prime Ribv4_computersF5A6B03690E4D45E12.00
2007-02-05Team Prime Ribv4_computersF5A6B03690E4D45E12.00
2015-05-21wombatmanManual testingF5A6B03690E4D45E12.18


PRP results:
No PRP results for M18824653


CERT results:
No CERT results for M18824653


P-1 factor-bounds graph:
B1 = 375000, B2 = 7968750 (P-1 stage 2)
B1 = 375000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
270
269
267
266
259
258
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00