factoring bug?

ATH · 2005-12-26, 13:24

I tried to do some factoring on a 35,000,000+ exponent with version 24.14 on an old Intel Celeron 1.1 Ghz.

I used "AdvancedFactor=35022811,35022829,1,69" in worktodo.ini and it started "Factoring M35022811 to 2^29" and then "Factoring M35022811 to 2^30" and both took around 30min then "Factoring M35022811 to 2^31" took over 90min but I was using the machine on and off during.

After 2^31 it suddently jumped to "Factoring M35022811 to 2^60":
prime95.jpg.

Both 2^60 and 2^61 took only 10min each and 2^62 took around 20min.

ATH · 2005-12-27, 12:09

I tried the same worktodo.ini on a P4 Northwood 3.4 Ghz and again it factored to 2^27, 2^28, 2^29, 2^30, 2^31 and then it jumped to 2^60.

Again the it took pretty long before the jump and was fast after. 2^30 to 2^31 took like 45min but to 2^60 took 2.5 min, and to 2^61 took 4-5min.

moo · 2005-12-27, 16:01

now try entering it into worktodo factor= number,starting bit and in prime.ini
factoroverride= bit number you want to go to.

ATH · 2005-12-29, 00:39

Yeah that works thanks. So I guess the advancedfactor function isn't working.

2005-12-26, 13:24	#1
ATH Einyen Dec 2003 Denmark C56₁₆ Posts	factoring bug? I tried to do some factoring on a 35,000,000+ exponent with version 24.14 on an old Intel Celeron 1.1 Ghz. I used "AdvancedFactor=35022811,35022829,1,69" in worktodo.ini and it started "Factoring M35022811 to 2^29" and then "Factoring M35022811 to 2^30" and both took around 30min then "Factoring M35022811 to 2^31" took over 90min but I was using the machine on and off during. After 2^31 it suddently jumped to "Factoring M35022811 to 2^60": prime95.jpg. Both 2^60 and 2^61 took only 10min each and 2^62 took around 20min. Last fiddled with by ATH on 2005-12-26 at 13:25

2005-12-27, 12:09	#2
ATH Einyen Dec 2003 Denmark C56₁₆ Posts	I tried the same worktodo.ini on a P4 Northwood 3.4 Ghz and again it factored to 2^27, 2^28, 2^29, 2^30, 2^31 and then it jumped to 2^60. Again the it took pretty long before the jump and was fast after. 2^30 to 2^31 took like 45min but to 2^60 took 2.5 min, and to 2^61 took 4-5min. Last fiddled with by ATH on 2005-12-27 at 12:09

2005-12-27, 16:01	#3
moo Jul 2004 Nowhere 1451₈ Posts	now try entering it into worktodo factor= number,starting bit and in prime.ini factoroverride= bit number you want to go to.

2005-12-29, 00:39	#4
ATH Einyen Dec 2003 Denmark 2×1,579 Posts	Yeah that works thanks. So I guess the advancedfactor function isn't working.