is 2 3763537 - 1
has 1132938 decimal digits
takes 0.395 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2B36102B3AA4FC7Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27063.491068.5714 %10000001005956952083.610210.8539 %147.101271.9827 %
Target2640.945765.6250 %2400022500000.02212.1595 %0.967966.3673 %
Difference+6+62.5452+2.9464 %+976000+10057319520+83.5881+8.6944%+146.1333+5.6153 %

Known prime factors (1 factor, 79.7 bits, 0.00211658% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
37635379540134271791275910020732479.658126744260409706028
22 × 31686065102426507
2023-08-0143168606510242650732,531262,905,443491,034,154

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-12Carsten Kossendeymother20000265000--0.0051.782%
2012-04-05Squeeky_SquirrelP4_260011000020350006--0.0334.151%
2016-01-15mikrMSI16000006600000012--0.77810.152%
2022-11-04JossManual testing100000010059569520--99.2916.653%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-02-23Mark RoseManual testing212600.041
2009-03-03S485122USB-Z2602610.041
2011-04-23markroldgamer2612620.082
2012-03-23GrunwalderGIMPManual testing212630.424
2016-02-23Mark RoseManual testing2622630.261
2015-01-25VictordeHollanderManual testing2632640.522
2015-01-25VictordeHollanderManual testing2642650.993
2016-02-28ramgeisManual testing2652661.986
2016-11-09Gordon SpenceManual testing2662673.971
2019-01-21TJAOIManual testing2672687.942
2019-02-08YxinityManual testing267268
2020-12-06axnManual testing26826915.88
2021-03-28axnManual testing26927031.77


ECM factoring results:
Total ECM effort:15.815 GHz-days
Estimated T-Level:21.271
DigitsB1CompleteFacMiss
20110002.7226.576%
25500000.25477.548%
302500000.01698.397%


ECM Summary

B1B2factorcurvesGHz-days
500005000000405.833
50000656930071.199
50000700000071.241
5000032425470127.542


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-31ANONYMOUSv4_computers2B36102B3AA4FC7B0.395


PRP results:
dateuseridcompidcofactorsres64
2023-08-01carlos56citronella
954013427179127591002073
C8BFC5D6B7924900


CERT results:
dateuseridcompid
2023-08-01iwessrvwes26


P-1 factor-bounds graph:
B1 = 1000000, B2 = 10059569520 (P-1 stage 2)
B1 = 1600000, B2 = 66000000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 110000, B2 = 2035000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=21.27 ~= 54-bit
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Last modified: 2024-02-09T03:30:02+00:00