mersenneforum.org  

Go Back   mersenneforum.org > Prime Search Projects > Conjectures 'R Us

Reply
 
Thread Tools
Old 2009-10-05, 18:27   #1
Siemelink
 
Siemelink's Avatar
 
Jan 2006
Hungary

10C16 Posts
Default Base 13 prime found

Hi everyone,

one of my side projects has given me a large prime. I had noticed that there was no prime with base 13 in the top 5000. So I found one:

Primality testing 6710*13^142143-1 [N+1, Brillhart-Lehmer-Selfridge]
Running N+1 test using discriminant 11, base 1+sqrt(11)
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
6710*13^142143-1 is prime! (10738.7531s+0.0591s)

Other bases that need the same treatment:
base 7, 11 have +1 but no -1
base 13 has -1 but no +1
Base 14 has no entries.

Cheers, Willem.
--
PS what would be the most fitting subforum? I decided on CRUS because this is where i hang out.
Siemelink is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mersenne Prime Found? No. houding PrimeNet 4 2014-09-21 15:32
How to know if you found a mersenne prime. Sutton Shin PrimeNet 7 2012-10-02 05:57
Base-6 speed for prime testing vs. base-2 jasong Conjectures 'R Us 36 2010-08-03 06:25
Prime found paulunderwood 3*2^n-1 Search 61 2008-04-22 12:19
I think I found a huge prime monst Lounge 16 2008-01-16 21:01

All times are UTC. The time now is 09:51.


Sat Feb 4 09:51:58 UTC 2023 up 170 days, 7:20, 1 user, load averages: 1.39, 1.16, 0.96

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