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Old 2022-04-08, 22:39   #2113
storm5510
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Quote:
Originally Posted by James Heinrich View Post
..Please don't do P-1 badly, you'll miss factors unnecessarily and (if done badly enough) people may need to re-do your work, which is the definition of inefficient.
Prime95 establishes its own P-1 and ECM bounds and I don't change them. If there is a difference between v29 and v30, I am unaware of it. I have no intention of doing anything "badly." This would be unnecessary work for someone else. I don't what that!
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Old 2022-04-08, 22:47   #2114
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Quote:
Originally Posted by storm5510 View Post
If there is a difference between v29 and v30, I am unaware of it.
There is. A huge difference. Since you posted about this in the v30.8 thread I assume you have been reading about it and are aware of the differences. In short, v30.8 can work with significantly higher bounds for significantly higher chance of factor for the same amount of allocated RAM.
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Old 2022-04-08, 23:05   #2115
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Originally Posted by James Heinrich View Post
There is. A huge difference. Since you posted about this in the v30.8 thread I assume you have been reading about it and are aware of the differences. In short, v30.8 can work with significantly higher bounds for significantly higher chance of factor for the same amount of allocated RAM.
I have 30.8 installed on two machines but have not been using it. I will give it another look.
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Old 2022-04-11, 05:05   #2116
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Found two factors for a TWOK candidate. one factor in stage one, one factor in stage two.
Both were missed by a 2003 P-1; both could be found with small B1, B2 so the large B2 from 30.8 was a little unnecessary.

19442623 has a 82-bit (25-digit) factor: 7705180804505006995733009 (P-1,B1=800000)
19442623 has a 78-bit (24-digit) factor: 152612436387610563716369 (P-1,B1=800000,B2=802202310)

Last fiddled with by axn on 2022-04-11 at 06:33 Reason: 70->78
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Old 2022-04-21, 12:56   #2117
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Default Composite factor

112084657

P-1 found a 238-bit composite factor(B1=824000, B2=242053350).

408942596393398983090401 - 78.436bits
1600346782413225832691898697103973353256067499521 - 160.131bits
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Old 2022-04-21, 13:31   #2118
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That is a top 5 all time P-1 factor. Congrats!!
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Old 2022-04-21, 14:39   #2119
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Quote:
Originally Posted by Jan S View Post
112084657

P-1 found a 238-bit composite factor(B1=824000, B2=242053350).

408942596393398983090401 - 78.436bits
1600346782413225832691898697103973353256067499521 - 160.131bits
Impressive - nice find!
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Old 2022-04-21, 17:57   #2120
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Quote:
Originally Posted by Uncwilly View Post
That is would have been* a top 5 all time P-1 factor. Congrats!!
Would have been if it were prime.
Composite factors' sizes are arbitrarily large and don't count.

Quote:
Originally Posted by lycorn View Post
Speaking of composite factors, I found this beauty some days ago:

UID: lycorn/supernova, ...
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Old 2022-04-21, 18:12   #2121
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Quote:
Originally Posted by Batalov View Post
Would have been if it were prime.
No, just the 160-bit prime component of the composite factor is #5 on the biggest P-1 Mersenne Factors list.
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Old 2022-04-21, 18:53   #2122
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Ah, ok.
That message said "a top 5 all time P-1 factor" (period). I know a thing or two about top all time P-1 factors - they are way larger.
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Old 2022-05-04, 05:56   #2123
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P-1 found a factor in stage #2, B1=490000, B2=13987000.
UID: Jwb52z/Clay, M114782309 has a factor: 274973054029559054066929 (P-1, B1=490000, B2=13987000)

77.864 bits.
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