is 2 2401579 - 1
has 722948 decimal digits
takes 0.162 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L6D9ACDBF5B2E816Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27099.497368.5714 %3102822434395080.51925.7699 %100.016570.3848 %
Target2630.664665.0794 %100007000000.00471.2750 %0.669265.5246 %
Difference+7+98.8327+3.4921 %+3092822+42739508+0.5145+4.4949%+99.3473+4.8602 %

Known prime factors (1 factor, 79.5 bits, 0.00331062% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24015798590792338946036525590072479.507178857167283400557
3 × 7 × 37 × 41 × 113 × 49684740877
2020-09-041134968474087750,980265.16495.25

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-11-16JossManual testing2000020000--0.0020.616%
2011-01-01Oscar Östlin7501175011--0.0081.407%
2011-01-23Oscar Östlin9000018450006--0.0194.139%
2014-02-15mikrMSI31028224343950812--0.51910.242%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2004-04-29ANONYMOUSv4_computers212580.016
1999-07-26ANONYMOUSv4_computers212590.016
2016-02-23Mark RoseManual testing2592600.032
2009-01-15Sturle Sundegibus.ifi2602610.064
2012-06-03Sebastian HornbostelManual testing2612620.128
2013-01-23dbaughManual testing2622630.409
2015-02-27VictordeHollanderManual testing2632640.818
2015-02-27VictordeHollanderManual testing2642651.556
2015-10-21ramgeisManual testing2652663.112
2017-06-29Gordon SpenceManual testing2662676.223
2019-01-17Anton RepkoManual testing26726937.34
2019-01-29YxinityManual testing26927049.79


ECM factoring results:
Total ECM effort:7.086 GHz-days
Estimated T-Level:21.441
DigitsB1CompleteFacMiss
20110003.1154.436%
25500000.28874.957%
302500000.01898.198%


ECM Summary

B1B2factorcurvesGHz-days
500005000000786.819
50000500000030.267


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-09-21kkmrkkblmbrbkv4_computers6D9ACDBF5B2E816E0.162
2015-03-28MadPooManual testing6D9ACDBF5B2E816E0.167


PRP results:
dateuseridcompidcofactorsres64
2020-09-07fre_gamesgpu
859079233894603652559007
0824A42222FDE8C5
2020-09-08marssystemssystem03
859079233894603652559007
0824A42222FDE8C5


CERT results:
No CERT results for M2401579


P-1 factor-bounds graph:
B1 = 3102822, B2 = 43439508 (P-1 stage 2)
B1 = 3102822 (P-1 stage 1)
B1 = 90000, B2 = 1845000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
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107
101
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1010
1011
TF factor-bounds graph:
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267
266
265
264
263
262
261
260
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258
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=21.44 ~= 55-bit
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Last modified: 2024-02-29T14:28:04+00:00