mersenneforum.org  

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

Reply
 
Thread Tools
Old 2007-10-11, 05:33   #1
devarajkandadai
 
devarajkandadai's Avatar
 
May 2004

22·79 Posts
Default Mally sequence

It is well known that there are infinite sequences of IMPOSSIBLE prime
factors of exponential functions of the type a^n+c where a belongs to N and is fixed, n is a variable belonging to N and c belongs to Z.(The only exception is 2^n-1 which has only 2 as an impossible factor.(For an
example see seq A123239 of OEIS).

Polynomials also have infinite sequences of IMPOSSIBLE prime factors
and x^2 + x + 97 (x belongs to N) has the following infinite sequence
of I.factors:

2,5,19...........

Let me call this a Mally sequence ( in honour of late Mally).
A.K.Devaraj
devarajkandadai is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mally devarajkandadai Math 12 2011-01-25 21:11
Mally's marginal notes devarajkandadai Math 3 2008-12-19 03:33
Mally devarajkandadai Math 2 2008-11-19 12:46
Mally's habits devarajkandadai Math 6 2008-01-20 15:38
A puzzle dedicated to Mally devarajkandadai Math 7 2007-10-08 11:39

All times are UTC. The time now is 15:14.


Sat May 21 15:14:57 UTC 2022 up 37 days, 13:16, 0 users, load averages: 1.46, 1.40, 1.31

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