is 2 18097787 - 1
has 5447977 decimal digits
takes 11.009 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L0CDF52541C0DF614double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273105.694965.7534 %100000041936466020.98806.9788 %126.682968.1434 %
Target2696.596863.7681 %130000180000000.97353.4562 %7.570265.0204 %
Difference+4+99.0982+1.9853 %+870000+401364660+20.0145+3.5226%+119.1127+3.1231 %

Known prime factors (1 factor, 103.3 bits, 0.00057088% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
180977871263582538364212098683751726463332103.317349098632436168051564468
22 × 3 × 11 × 1319 × 60293 × 506773 × 65621939
2022-02-22506773656219398.006e+93.57635.8902

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-02-09ANONYMOUSv4_computers2100004305000--0.3823.863%
2022-02-22Sid & AndyMagic_8_Ball1000000419364660232103.31725.169.719%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-20Net_Forcev4_computers212580.002
2001-11-03Jossv4_computers212590.002
2002-04-07ANONYMOUSv4_computers212660.413
2014-08-17NesowaManual testing2662670.826
2016-06-14mikrManual testing2672681.652
2017-09-15ramgeisManual testing2682693.303
2020-03-10lycornManual testing2692706.607
2021-09-11SRBaseManual testing27027113.21
2021-10-08ANONYMOUSManual testing27127226.43
2021-11-08RichD0Manual testing27227352.85


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)
2003-03-07ANONYMOUSv4_computersFC1ED5877028D16111.01
2004-02-14ANONYMOUSv4_computers0CDF52541C0DF61411.01
2007-04-07TheJudgerv4_computers0CDF52541C0DF61411.01


PRP results:
No PRP results for M18097787


CERT results:
No CERT results for M18097787


P-1 factor-bounds graph:
B1 = 1000000, B2 = 419364660 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 210000, B2 = 4305000 (P-1 stage 2)
B1 = 210000 (P-1 stage 1)
104
105
106
104
105
106
107
108
109
TF factor-bounds graph:
273
272
271
270
269
268
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
290
2100
2110
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Last modified: 2024-03-13T02:15:48+00:00