mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 7 of 7
Search took 0.01 seconds.
Search: Posts Made By: Greenbank
Forum: Octoproth Search 2006-01-20, 16:04
Replies: 15
Views: 11,447
Posted By Greenbank
OK, n=56 is complete! Estimate was 280214. ...

OK, n=56 is complete!

Estimate was 280214.

Final count after isprime() PARI checking script: 285415

2^n = 72057594037927936 so I used a kmax of 72060T.

Output:
Forum: Octoproth Search 2006-01-19, 12:35
Replies: 15
Views: 11,447
Posted By Greenbank
n=55 [0,1E16] = 229947 n=55 [1E16,2E16] =...

n=55 [0,1E16] = 229947
n=55 [1E16,2E16] = 214250
n=55 [2E16,3E16] = 211102
n=55 [3E16,3.61E16] = 131672

Every 3-prp output by your program was indeed a prime! None failed the tests with PARI.
...
Forum: Octoproth Search 2006-01-16, 13:03
Replies: 15
Views: 11,447
Posted By Greenbank
If I put my whole G5 on it I can have n=55 done...

If I put my whole G5 on it I can have n=55 done in a shade under 2 days. I think this may be the limit of computing all Octoproths for a specific n. Let me check Robert's estimation formula:-
...
Forum: Octoproth Search 2006-01-16, 11:09
Replies: 15
Views: 11,447
Posted By Greenbank
Yeah, I meant to say 2^55 ~ 3.6E16. I was just...

Yeah, I meant to say 2^55 ~ 3.6E16. I was just trying to point out that 3E15 was an order of magnitude out.

2^55 = 36028797018963968
3.6E16 = 36000000000000000

robert44444uk, I'll send you an...
Forum: Octoproth Search 2006-01-16, 08:41
Replies: 15
Views: 11,447
Posted By Greenbank
2^55 = 3.6E16 So if you've done to 3e15 then...

2^55 = 3.6E16

So if you've done to 3e15 then you've only done 8.3%
Forum: Octoproth Search 2006-01-13, 16:00
Replies: 15
Views: 11,447
Posted By Greenbank
Nice work. f(49) = 55410 real count is...

Nice work.

f(49) = 55410

real count is 56905.
Forum: Octoproth Search 2006-01-13, 13:59
Replies: 15
Views: 11,447
Posted By Greenbank
Number of octoproths per n

All ranges checked from k=1 to 2^n (where 2^n-k would be 0).

All primes verified with PARI 2.1.7.

n<=26 op=0
n=27 op=1
n=28 op=2
n=29 op=1
n=30 op=1
n=31 op=2
Showing results 1 to 7 of 7

 
All times are UTC. The time now is 21:33.


Sun May 22 21:33:09 UTC 2022 up 38 days, 19:34, 0 users, load averages: 0.79, 1.00, 1.10

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, 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