C278_135_128 For 15e?
 

C278_135_128 seems suitable for 15e, though I'm not sure where it stands wrt ECM.

[code]
n: 33927504534476723516408816689812909770719932521618781773756995289471261780068216894657109048688644848466558715329703788016114249127096969960226894868006429336428695102577256482033601100297718050792231930859693133081358214479422873421598023360475055929769632226103912177557671593
# 135^128+128^135, difficulty: 286.77, anorm: 1.81e+039, rnorm: -8.22e+052
# scaled difficulty: 289.05, suggest sieving rational side
# size = 2.717e-014, alpha = 0.000, combined = 7.892e-015, rroots = 0
type: snfs
size: 286
skew: 2.4183
c6: 1
c0: 200
Y1: -13098464280290651262885471684574127197265625000
Y0: 2923003274661805836407369665432566039311865085952
rlim: 500000000
alim: 500000000
lpbr: 33
lpba: 33
mfbr: 66
mfba: 66
rlambda: 3.0
alambda: 3.0
[/code]


Test sieving with Q in blocks of 2000
[code]
Q= 20M 3218 0.24388 sec/rel
Q=100M 3057 0.26519 sec/rel
Q=200M 2838 0.31295 sec/rel
Q=300M 2623 0.37733 sec/rel
Q=400M 2195 0.43902 sec/rel
Q=500M 2564 0.55437 sec/rel
Q=600M 2088 0.56867 sec/rel
Q=700M 2051 0.62015 sec/rel
Q=800M 1924 0.68246 sec/rel
[/code]

FWIW.

[QUOTE=swellman;462654]C278_135_128 seems suitable for 15e, though I'm not sure where it stands wrt ECM.[/quote]

I'd done 20920 curves at B1=3e8 which was enough according to the Bayesian analysis. Job queued up.

[QUOTE=fivemack;462137]I think we have done enough ECM and can proceed to SNFS at once; I'll be interested to see your timing information once it's available.[/QUOTE]

Do you still want to queue [url=http://www.mersenneforum.org/showpost.php?p=462424&postcount=55]C228_150_142[/url] as well? It appears ready for 15e, though back to back 33-bit jobs may smother the fire.

Thank you for enqueing C278_135_128. Seems to be near the limits of 15e.