Re: Mersenne: Are problems more likely in the last 1% of a 10,gigadigit LL?

2002-02-14 Thread Steve Harris
-Original Message- From: Russel Brooks [EMAIL PROTECTED] How about a Prime95 option where it makes a daily backup for you, saved to a datestamp fileid? It could save them to a subdirectory with the exponent name. That would make it easy for the user to do a cleanup occasionally.

Re: Mersenne: Are problems more likely in the last 1% of a 10,gigadigit LL?

2002-02-14 Thread Alexander Kruppa
Steve Harris wrote: There is already a feature which does effectively the same thing. Set 'InterimFiles=100' in prime.ini and it will write a save file in the working directory with a sequential extension every million iterations (or however often you set it). You must manually edit

Re: Mersenne: Are problems more likely in the last 1% of a 10,gigadigit LL?

2002-02-14 Thread bjb
On 14 Feb 2002, at 0:47, Russel Brooks wrote: George Woltman wrote: ***NOTE: There is an important lesson to be learned here. All testers of 10M digit numbers should backup their save files regularly!! You don't want a hardware glitch, disk crash, etc. cause you to loose months of

Re: Mersenne: Are problems more likely in the last 1% of a 10 gigadigit LL?

2002-02-14 Thread bjb
On 13 Feb 2002, at 16:39, George Woltman wrote: ***NOTE: There is an important lesson to be learned here. All testers of 10M digit numbers should backup their save files regularly!! You don't want a hardware glitch, disk crash, etc. cause you to loose months of work. Same applies to LL

Re: Mersenne: Are problems more likely in the last 1% of a 10,gigadigit LL?

2002-02-14 Thread Russel Brooks
Steve Harris wrote: From: Russel Brooks [EMAIL PROTECTED] How about a Prime95 option where it makes a daily backup for you, There is already a feature which does effectively the same thing. Set 'InterimFiles=100' in prime.ini and it will write a save file in the working directory with a

Re: Mersenne: Are problems more likely in the last 1% of a 10 gigadigit LL?

2002-02-13 Thread George Woltman
Hi, At 09:44 PM 2/12/2002 -0800, Gerry Snyder wrote: I was seeing a bunch of suminputs != sumoutputs, and after rebooting, the errors switched to round off [4] 0.40 Was I just unlucky about timing, with only about 0.3% left? Dang. That is unlucky. Looks like a hardware problem. Is the CPU

Re: Mersenne: Are problems more likely in the last 1% of a 10,gigadigit LL?

2002-02-13 Thread Russel Brooks
George Woltman wrote: ***NOTE: There is an important lesson to be learned here. All testers of 10M digit numbers should backup their save files regularly!! You don't want a hardware glitch, disk crash, etc. cause you to loose months of work. How about a Prime95 option where it makes a

Mersenne: Are problems more likely in the last 1% of a 10 gigadigit LL?

2002-02-12 Thread Gerry Snyder
HELP! Until this evening I was expecting to see my first result from a LL test on a 10,000,000-digit Mersenne number tomorrow morning. When I got home from dinner tonight I was seeing a bunch of suminputs != sumoutputs, and after rebooting, the errors switched to round off [4] 0.40 Was I just