is 2 1244249 - 1
has 374557 decimal digits
takes 0.039 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LBA1323858BCBAE83double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26723.881068.6567 %42184751560835650.57418.7466 %24.455171.3982 %
Target2600.123465.0000 %50001500000.00060.8328 %0.124065.2915 %
Difference+7+23.7576+3.6567 %+4213475+155933565+0.5735+7.9139%+24.3311+6.1067 %

Known prime factors (1 factor, 68.6 bits, 0.00551155% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12442494404149647734530958072168.577176980236581847
3 × 31 × 1903013296579
2016-04-1631190301329657947.9044,764.98,899.5

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-02-24ANONYMOUSv4_computers204820480012--0.0010.992%
2003-11-28eteov4_computers20000020000006--0.0145.864%
2014-09-25JossManual testing251584251584--0.0123.233%
2015-01-09mikrMSI421847515608356512--0.55614.592%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-17ANONYMOUSv4_computers212570.015
2003-05-26ANONYMOUSv4_computers212580.031
2016-02-23Mark RoseManual testing2582600.093
2009-04-10Sturle Sundeklengel.ifi2602610.123
2011-05-09XyzzyManual testing2612620.247
2012-11-13dbaughManual testing2622630.789
2015-04-03omylistManual testing2632641.578
2015-04-06monstManual testing2642653.003
2015-09-20ramgeisManual testing2652666.006


ECM factoring results:
Total ECM effort:20.316 GHz-days
Estimated T-Level:25.687
DigitsB1CompleteFacMiss
201100015.2080.000%
25500001.66718.888%
302500000.13787.162%
3510000000.00999.076%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027810.51
50000500000030.111
25000035000000449.70


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-08-17ANONYMOUSv4_computersBA1323858BCBAE830.039


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-3
440414964773453095807
C4A041349CF8A5C3
2017-10-20kkmrkkblmbrbkc4.xlarge
440414964773453095807
C4A041349CF8A5C3


CERT results:
No CERT results for M1244249


P-1 factor-bounds graph:
B1 = 4218475, B2 = 156083565 (P-1 stage 2)
B1 = 4218475 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 251584 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.69 ~= 69-bit
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Last modified: 2024-02-09T03:30:02+00:00