is 2 1777121 - 1
has 534967 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L08594AB685F4099Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.720368.6567 %2475400866600000.55557.9635 %17.275871.1527 %
Target2610.172965.5738 %80006000000.00321.4556 %0.176066.0749 %
Difference+6+16.5474+3.0829 %+2467400+86060000+0.5523+6.5079%+17.0998+5.0779 %

Known prime factors (1 factor, 85.0 bits, 0.00478155% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1777121379906197785582858150297692684.97410688810660207798404
22 × 113 × 13 × 19 × 128147 × 63428719
2015-05-23128147634287194,325,2450.28140.5077

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-10Carsten Kossendeymother9500016150006--0.0144.853%
2014-04-10ANONYMOUSManual testing100000100000--0.0082.026%
2014-05-09JossManual testing136117136117--0.0112.337%
2014-09-18JossManual testing172234172234--0.0142.591%
2015-05-23mikrMSI2475400866600001222684.9740.55612.682%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-04-20Architects Cubedm1_tt2602610.086
2010-12-13GrunwalderGIMPManual testing212630.898
2015-05-08snme2pm1Manual testing2632653.207


ECM factoring results:
Total ECM effort:38.532 GHz-days
Estimated T-Level:25.717
DigitsB1CompleteFacMiss
201100014.8230.000%
25500001.68418.567%
302500000.14386.638%
3510000000.01099.012%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025817.66
250000400000004920.87


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27ANONYMOUSv4_computers08594AB685F4099E0.096


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-1
37990619778558285815029769
38CCBC3DB536F30B
2017-11-04kkmrkkblmbrbkold
37990619778558285815029769
38CCBC3DB536F30B


CERT results:
No CERT results for M1777121


P-1 factor-bounds graph:
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 95000, B2 = 1615000 (P-1 stage 2)
B1 = 172234 (P-1 stage 1)
B1 = 136117 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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105
106
107
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104
105
106
107
108
TF factor-bounds graph:
265
263
261
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00