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 2020-10-22, 06:36 #188 sweety439   Nov 2016 22·691 Posts Why 10^371+-1 are factored earlier than 10^365+-1? eulerphi(371) = 312 > 288 = eulerphi(365)
2020-10-22, 08:56   #189
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

7×659 Posts

Quote:
 Originally Posted by sweety439 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?

 2021-01-11, 19:17 #190 charybdis   Apr 2020 16910 Posts 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?
 2021-01-11, 19:33 #191 VBCurtis     "Curtis" Feb 2005 Riverside, CA 7×659 Posts Sure! I can start poly select this evening. Can you contact Sam to reserve it for MersenneForum?
2021-01-11, 19:42   #192
charybdis

Apr 2020

132 Posts

Quote:
 Originally Posted by VBCurtis 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?

 2021-01-11, 19:58 #193 VBCurtis     "Curtis" Feb 2005 Riverside, CA 7·659 Posts 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.
 2021-01-11, 20:19 #194 charybdis   Apr 2020 132 Posts Got the go-ahead from Sam. I'll do P=5M, admax=10M, incr=420.
 2021-01-11, 23:49 #195 VBCurtis     "Curtis" Feb 2005 Riverside, CA 7·659 Posts 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
 2021-01-12, 03:14 #196 firejuggler     Apr 2010 Over the rainbow 2·1,259 Posts 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
 2021-01-12, 17:20 #197 charybdis   Apr 2020 A916 Posts 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.
 2021-01-12, 17:48 #198 firejuggler     Apr 2010 Over the rainbow 2·1,259 Posts 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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