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Thread / Thread Starter	Last Post	Replies	Views
Sticky: Proposal for new subforum ( 1 2 3 4 5) ewmayer	2005-10-10 23:25 by ewmayer	49	27,792
On the Infinity of Twin Prime and other K-tuples ( 1 2 3 4 5 ... Last Page) jzakiya	2022-07-04 02:35 by jzakiya	70	23,189
Getting others to do the work on exponents I like (was: Trial Factoring Progress) ( 1 2 3 4 5 ... Last Page) tuckerkao	2022-07-03 18:35 by tuckerkao	577	72,371
Is it possible for an odd perfect number to have the form 8*k+5? carpetpool	2022-07-03 02:55 by carpetpool	0	71
Phi mod 11 is congruent 4 and 8 ( 1 2 3) x13420x	2022-07-02 22:12 by Batalov	32	796
factoring Semiprimes with Proximal factors a1call	2022-06-25 02:25 by a1call	8	122
Fermat numbers and primality bur	2022-06-23 16:39 by mathwiz	1	82
Ulam spirale, envolved to RomanM	2022-06-23 12:20 by RomanM	2	212
What is the largest perfect number found? usergood	2022-06-22 17:41 by retina	10	352
Primes made me do it! My prime discovery lonestar108	2022-06-15 03:51 by retina	1	236
A test for primality? paulunderwood	2022-06-11 11:54 by paulunderwood	8	453
Pseudo Fact - Last Digits of Mersenne Primes Graph2022	2022-05-21 13:58 by Dr Sardonicus	8	823
Does it sound random? - Regards Perfect numbers ( 1 2) Graph2022	2022-05-06 15:06 by Dr Sardonicus	11	890
Presentation and doubts with the application and competition of 100000000 prime digits ( 1 2 3) apzyx	2022-05-06 13:40 by Dr Sardonicus	29	1,575
ONCE AGAIN: a seemingly fresh proof of the Twin Prime Conjecture.... NOT rudy235	2022-05-03 02:52 by Dr Sardonicus	4	375
Primes p such that p^2+p+1=q is prime, and p is largest prime factor of q^3-1 Stargate38	2022-04-18 14:22 by Dr Sardonicus	2	705
Beal's conjecture ..........not ( 1 2) Awojobi	2022-04-12 04:56 by sweety439	14	1,323
OEIS Goldbach sequences ATH	2022-04-09 20:14 by ATH	0	356
visualisations of primes / cycle representations bhelmes	2022-04-03 14:07 by Dr Sardonicus	2	715
mod x^4+1 ( 1 2 3) paulunderwood	2022-03-23 13:01 by Dr Sardonicus	26	1,955
On the density of Euler’s Phi function of the sets of numbers in form of p+/-n and their relation to MarcinLesniak	2022-03-23 10:17 by MarcinLesniak	0	339
Cheap sieve primes hub birtwistlecaleb	2022-03-19 21:53 by birtwistlecaleb	10	532
Prime next to multiple of 6 ( 1 2) jovada	2022-03-13 18:18 by Dobri	13	1,447
Strengthening Damg ̊ard and Frandsen, and Khashin paulunderwood	2022-03-11 15:54 by paulunderwood	0	306
Pattern in composite palindrome numbers hunson	2022-02-23 19:26 by hunson	9	1,319
Miscellany log-series question mart_r	2022-02-22 20:56 by mart_r	4	625

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≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ 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