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Old 2020-10-22, 06:36   #188
sweety439
 
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Why 10^371+-1 are factored earlier than 10^365+-1? eulerphi(371) = 312 > 288 = eulerphi(365)
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Old 2020-10-22, 08:56   #189
VBCurtis
 
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Quote:
Originally Posted by sweety439 View Post
Why 10^371+-1 are factored earlier than 10^365+-1? eulerphi(371) = 312 > 288 = eulerphi(365)
What relevance does this information have to do with deciding which to factor first?
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Old 2021-01-11, 19:17   #190
charybdis
 
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Sam Wagstaff just knocked 2,2390M down to c191 with ECM.
No-one has reserved it yet - could this be a target for a short forum team sieve?
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Old 2021-01-11, 19:33   #191
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Sure! I can start poly select this evening. Can you contact Sam to reserve it for MersenneForum?
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Old 2021-01-11, 19:42   #192
charybdis
 
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Quote:
Originally Posted by VBCurtis View Post
Sure! I can start poly select this evening. Can you contact Sam to reserve it for MersenneForum?
Done. I suppose it's possible he's already started working on it himself and just hasn't got round to updating the reservation page, so I'll keep everyone updated.

What parameters are you using for polyselect, so I know not to overlap with you?
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Old 2021-01-11, 19:58   #193
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I figured I'd start after you, so I'd work around whatever region you select.
I'm fine with using admin of your admax, and incr of 2310 or 4620 to cover a large region up there.
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Old 2021-01-11, 20:19   #194
charybdis
 
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Got the go-ahead from Sam.

I'll do P=5M, admax=10M, incr=420.
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Old 2021-01-11, 23:49   #195
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Taking admin 15M, admax 60M, incr 4620, P=4M.

That leaves 10-15M / incr 420 for anyone else to contribute on CADO if they choose.

Last fiddled with by VBCurtis on 2021-01-11 at 23:50
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Old 2021-01-12, 03:14   #196
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I've got a 1.377e-14 with Msieve, trying to use cado to spin it up.
Record is around 2e-14 so still a bit far
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Old 2021-01-12, 17:20   #197
charybdis
 
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The best from my run, by some margin, is
Code:
n: 28653448550423582065969107478752150888235561427247664110066527668159681894430155521476413904809897034030256344677647748498114768327844226758360594247371333432148627535343266861185808662829021
skew: 61160593.83
c0: -782066809369899992846921498396677009099575965
c1: 129978232145697650128010452670728125268
c2: 1136403038232649046041648047998
c3: -50366553898678575377716
c4: 291334628577375
c5: 2637600
Y0: -6410674956398678515938860432260175622
Y1: 195016503229310813759987119
Cownoise scores this as 2.023e-14. I tried spinning with EdH's script but didn't get an improvement.
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Old 2021-01-12, 17:48   #198
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That's still close to the record for a C191, so good enough?
afaik

Code:
...

 191    2.108e-14    EdH/spin              06-20    kosta M61^16+1
...
from the best poly score

Last fiddled with by firejuggler on 2021-01-12 at 18:05
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