is 2 1246499 - 1
has 375234 decimal digits
takes 0.040 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDCDFCFDB7CF04D43double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26995.777769.5652 %37000000119316517320300.359817.7054 %396.137474.9538 %
Target2600.123265.0000 %50001500000.00060.8331 %0.123865.2916 %
Difference+9+95.6545+4.5652 %+36995000+119316367320+300.3592+16.8723%+396.0136+9.6622 %

Known prime factors:
No known factors for M1246499

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-02-24ANONYMOUSv4_computers204820480012--0.0010.993%
2003-11-28eteov4_computers20000020000006--0.0145.865%
2014-09-25JossManual testing251491251491--0.0123.233%
2015-01-13mikrMSI421847515608356512--0.57414.594%
2022-04-24Sid & AndyPterodactyl37000000119316517320--361.828.154%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-17ANONYMOUSv4_computers212570.015
2003-06-01ANONYMOUSv4_computers212580.031
2016-02-23Mark RoseManual testing2582600.092
2009-02-15Sturle Sundegoscha.ifi2602610.123
2012-09-14AxelssonManual testing2612620.246
2012-10-07dbaughManual testing2622630.788
2015-04-04omylistManual testing2632641.575
2015-04-06monstManual testing2642652.997
2015-09-20ramgeisManual testing2652665.995
2018-09-14YxinityManual testing26626711.99
2020-04-26Gordon SpenceManual testing26726823.98
2024-03-26krackerManual testing268269


ECM factoring results:
Total ECM effort:19.071 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028110.64
25000025000000448.432


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-12MadPooManual testingDCDFCFDB7CF04D430.040


PRP results:
No PRP results for M1246499


CERT results:
No CERT results for M1246499


P-1 factor-bounds graph:
B1 = 37000000, B2 = 119316517320 (P-1 stage 2)
B1 = 37000000 (P-1 stage 1)
B1 = 4218475, B2 = 156083565 (P-1 stage 2)
B1 = 4218475 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 251491 (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=25.66 ~= 69-bit
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Last modified: 2024-03-26T19:56:07+00:00