mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Miscellaneous Math

Reply
 
Thread Tools
Old 2013-10-23, 05:41   #1
devarajkandadai
 
devarajkandadai's Avatar
 
May 2004

22×79 Posts
Default Two possible challenges

1) This is with reference to the large prime: Id 116042 in the database pertaining to large primes. Q: Is this Sophie prime also a Mangammal prime?

(for definition see A123239 ).

2) Are there infinitely many Shantha primes? ( see encyclopedia in planetmath.org )

A.K. Devaraj
devarajkandadai is offline   Reply With Quote
Old 2013-11-09, 23:30   #2
MattcAnderson
 
MattcAnderson's Avatar
 
"Matthew Anderson"
Dec 2010
Oregon, USA

110410 Posts
Default

Hi man,

I admire your contribution to the encyclopedia for integer sequences and to this forum.

To quote

oeis.org/A123239 Primes that do not divide 3^n-2 for any n.

Cheers,

Matt
MattcAnderson is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
FNV hash challenges Rich Puzzles 2 2011-12-23 18:17
The RSA Challenges - RIP BotXXX Factoring 16 2007-05-27 03:37
Coding Challenges R.D. Silverman Programming 18 2005-08-09 13:14
[Req. Help] Devised Algorithm - Computing All RSA Challenges Exluminis Miscellaneous Math 5 2003-03-28 17:51
[help] Devised Algorithm Cmpting. All RSA Factr. Challenges Exluminis Software 2 2003-03-26 15:50

All times are UTC. The time now is 16:44.


Fri May 27 16:44:17 UTC 2022 up 43 days, 14:45, 0 users, load averages: 1.54, 1.53, 1.63

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