mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Software

Reply
 
Thread Tools
Old 2006-12-17, 03:59   #1
JuanTutors
 
JuanTutors's Avatar
 
"Juan Tutors"
Mar 2004

571 Posts
Default "Feature" request: Keep new B2 value when memory allotment increased

Here's the situation:

950MB: B1=400000, B2=103 00000
1000MB: B1=400000, B2=104 00000

However, when stage 2 has already been started, even though the B1 values stays the same, Prime95 still says "Ignoring suggested B2 value, using B2=10300000 from the save file".
JuanTutors is offline   Reply With Quote
Old 2006-12-17, 08:02   #2
S485122
 
S485122's Avatar
 
"Jacob"
Sep 2006
Brussels, Belgium

1,901 Posts
Default

The 50 MB increase in memory does not make it worth to redo all work already done. Next time the program will have to do stage 2 of P-1 factoring it will use the bigger value.

If you absolutely want Prime 95 to use 1000MB instead of 950 MB on the current exponent, stop the program and delete the intermediate result file, something like "m0C15621.000" for an exponent like 37 015 621. Restart Prime95 it will start the P-1 computations all over. You would lose all work already done on the exponent (stage 1 and stage 1 GCD and the start of stage 2.) I do not know by how much you would increase your chances of finding a factor with the new B2 value, it is probably marginal.
S485122 is offline   Reply With Quote
Old 2006-12-18, 05:19   #3
JuanTutors
 
JuanTutors's Avatar
 
"Juan Tutors"
Mar 2004

10001110112 Posts
Default

Quote:
Originally Posted by Jacob Visser View Post
The 50 MB increase in memory does not make it worth to redo all work already done. Next time the program will have to do stage 2 of P-1 factoring it will use the bigger value.
Do you know enough about the code to be sure that it has to restart stage 2 because of the new B2 value?
JuanTutors is offline   Reply With Quote
Old 2006-12-18, 06:31   #4
S485122
 
S485122's Avatar
 
"Jacob"
Sep 2006
Brussels, Belgium

35558 Posts
Default

My answer was based on my understanding of bits and pieces of this forum, the FAQ and the wiki.

If I understood well changing the B1 and B2 limits, means the tables used for the P-1 stage 2 have to be recomputed. With the table changed it is not possible to resume the work. But I may be corrected by more knowledgeable people.
S485122 is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Misfit "unsupported feature" LaurV MISFIT 11 2019-12-16 05:03
"Hybrid Memory Cube" offers 1 Tb/s memory bandwith at just 1.4 mW/Gb/s ixfd64 Hardware 4 2011-12-14 21:24
Feature request @ "too few cycles" after filtering Andi47 Msieve 2 2010-01-11 08:50
"Spare" work feature request Xyzzy Software 0 2009-08-23 06:25
Prime95 Version 24.13 "Feature" RMAC9.5 Software 2 2006-03-24 21:12

All times are UTC. The time now is 22:23.


Fri Jan 27 22:23:56 UTC 2023 up 162 days, 19:52, 0 users, load averages: 1.35, 1.25, 1.22

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎𝜍 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔