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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	28,445
Probable primes off the form (2^(p^2)-1) / (2^p-1) ( 1 2) a1call	2022-08-17 15:43 by ryanp	12	245
Mistake in OEIS ? kijinSeija	2022-08-17 12:11 by kijinSeija	0	46
Getting others to do the work on exponents I like (was: Trial Factoring Progress) ( 1 2 3 4 5 ... Last Page) tuckerkao	2022-08-16 10:51 by Viliam Furik	584	77,705
Sieve Wheel User140242	2022-08-10 13:04 by Dr Sardonicus	10	817
Primes made me do it! My prime discovery lonestar108	2022-07-31 20:43 by xilman	4	547
Value-Counting Up to N BAbdulBaki	2022-07-31 11:02 by BAbdulBaki	0	76
Mp mod D ( 1 2 3) User140242	2022-07-22 08:21 by User140242	27	1,235
3 mod 4 with free parameter paulunderwood	2022-07-19 18:03 by paulunderwood	4	229
More left twin primes (below Mersenne p) than right twin primes ( 1 2 3 4) drkirkby	2022-07-17 03:34 by sweety439	43	5,915
Mersenne Primes p which are in a set of twin primes is finite? carpetpool	2022-07-14 02:29 by sweety439	4	6,650
On the mod(x^2,p)=mod(x^2,p^2)=mod(x^2,p^3) = and so on RomanM	2022-07-08 18:49 by Batalov	1	127
Moved: Is it possible for an odd perfect number to have the form 8*k+5? carpetpool	-	-	-
Phi mod 11 is congruent 4 and 8 ( 1 2 3) x13420x	2022-07-02 22:12 by Batalov	32	1,035
factoring Semiprimes with Proximal factors a1call	2022-06-25 02:25 by a1call	8	164
Fermat numbers and primality bur	2022-06-23 16:39 by mathwiz	1	127
Ulam spirale, envolved to RomanM	2022-06-23 12:20 by RomanM	2	250
What is the largest perfect number found? usergood	2022-06-22 17:41 by retina	10	404
A test for primality? paulunderwood	2022-06-11 11:54 by paulunderwood	8	599
Pseudo Fact - Last Digits of Mersenne Primes Graph2022	2022-05-21 13:58 by Dr Sardonicus	8	1,142
Does it sound random? - Regards Perfect numbers ( 1 2) Graph2022	2022-05-06 15:06 by Dr Sardonicus	11	1,108
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	2,102
ONCE AGAIN: a seemingly fresh proof of the Twin Prime Conjecture.... NOT rudy235	2022-05-03 02:52 by Dr Sardonicus	4	571
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	845
Beal's conjecture ..........not ( 1 2) Awojobi	2022-04-12 04:56 by sweety439	14	1,490
OEIS Goldbach sequences ATH	2022-04-09 20:14 by ATH	0	428

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≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 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