is 2 2418659 - 1
has 728089 decimal digits
takes 0.163 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L085F6472952C6254double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27098.794768.5714 %3102822434395080.51925.7742 %99.313970.3862 %
Target2630.659965.0794 %100007000000.00471.2769 %0.664565.5253 %
Difference+7+98.1348+3.4921 %+3092822+42739508+0.5145+4.4974%+98.6493+4.8609 %

Known prime factors (1 factor, 87.5 bits, 0.00361650% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24186592144475934666231509853025932787.47144331919767652891744
25 × 64794559 × 21381000413
2021-01-03647945592138100041312,958,810120.11213.12

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-08ANONYMOUSv4_computers2048204800--0.0010.656%
2010-11-09JossManual testing1500015000--0.0020.498%
2010-11-16JossManual testing2000020000--0.0020.617%
2010-12-18markrtiny9500019237506--0.0204.216%
2014-04-04mikrMSI31028224343950812--0.51910.248%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-03-15akohlerv4_computers212590.016
2016-02-23Mark RoseManual testing2592600.032
2009-01-11Sturle Sundeothello.ifi2602610.064
2012-06-04Sebastian HornbostelManual testing2612620.127
2013-12-04Jerry HallettManual testing2622630.406
2015-02-27VictordeHollanderManual testing2632640.812
2015-02-27VictordeHollanderManual testing2642651.545
2015-10-22ramgeisManual testing2652663.090
2017-07-05Gordon SpenceManual testing2662676.179
2019-04-02Anton RepkoManual testing26726937.08
2019-04-18Anton RepkoManual testing26927049.43


ECM factoring results:
Total ECM effort:9.521 GHz-days
Estimated T-Level:21.922
DigitsB1CompleteFacMiss
20110004.1541.570%
25500000.38468.090%
302500000.02497.605%
3510000000.00199.887%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001039.075
50000500000050.446


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23ANONYMOUSv4_computers085F6472952C62540.163
2018-05-19kkmrkkblmbrbkold085F6472952C62540.163


PRP results:
dateuseridcompidcofactorsres64
2021-01-04riccardo ubertiDuallie
214447593466623150985302593
A320A82CA0D8FB86


CERT results:
dateuseridcompid
2021-01-04curtiscjckl2f11398l


P-1 factor-bounds graph:
B1 = 3102822, B2 = 43439508 (P-1 stage 2)
B1 = 3102822 (P-1 stage 1)
B1 = 95000, B2 = 1923750 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
270
269
267
266
265
264
263
262
261
260
259
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=21.92 ~= 56-bit
250
260
270
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290
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Last modified: 2024-02-29T14:28:04+00:00