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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	30,976
modulo operations on the exponents of Mersenne primes CodyLuo	2023-09-23 18:56 by kriesel	5	206
Conjecture: when n>1 and 0<b<sqrt(n)-1, 2^(n^2±b)-1 is always composite CodyLuo	2023-09-23 10:10 by charybdis	1	92
Goldbach conjecture and semiprimes? mathnewbiez	2023-09-21 19:23 by science_man_88	1	166
How to decide whether an unfactored RSA number has sum of squares representation? ( 1 2 3) HermannSW	2023-09-14 15:13 by Dr Sardonicus	26	936
factoring large semiprimes ( 1 2) claugoru	2023-09-12 13:32 by Dr Sardonicus	18	1,047
Efficiently compute RSA number factor exponents not knowing factorization HermannSW	2023-09-10 21:03 by science_man_88	1	188
Well, at least in my opinion, the problem is: ( 1 2) Deuterium	2023-09-06 21:55 by science_man_88	19	1,507
Padrão de existência do número primo dantaseudaldo	2023-08-24 12:40 by LaurV	7	721
kronecker(5,n)==-1 && kronecker(-1,n)==-1 test paulunderwood	2023-08-21 19:19 by paulunderwood	6	549
Mp mod D ( 1 2 3 4) User140242	2023-08-17 10:57 by User140242	33	5,725
3 mod 4 with free parameter ( 1 2) paulunderwood	2023-08-16 11:34 by paulunderwood	21	2,232
Mersenne prime / perfect number ( 1 2 3) MGprime	2023-08-14 11:34 by MGprime	24	986
[SOLVED] Security vulnerability in the RSA algorithm [NOT] marsik	2023-08-13 20:53 by science_man_88	10	475
Prime numbers code marsik	2023-08-13 18:58 by User140242	4	299
Short [and false] Version Of Wilson's theorem Lan	2023-08-10 22:57 by Lan	5	244
Collatz conjecture ( 1 2) RMLabrador	2023-08-06 13:18 by Dr Sardonicus	18	4,417
Amazing pattern with -12 (was -3) ( 1 2 3 4 5) paulunderwood	2023-08-03 12:15 by paulunderwood	53	7,600
((2^n) - 2) / n if divisible n is prime =) apzyx	2023-07-05 19:23 by apzyx	5	366
n-1 is mersenne number if sigma(simga(n) - n) == n and n power of two??? apzyx	2023-07-03 21:17 by charybdis	1	424
Computing Dedekind number D(9). ( 1 2) Teonum	2023-06-27 09:48 by kruoli	20	5,754
Lucas–Lehmer test in reverse User140242	2023-05-29 19:26 by Batalov	9	1,866
What's known about Mersenne prime exponent composites? ( 1 2) jnml	2023-05-20 02:09 by bhelmes	15	1,814
factoring Carmichael numbers (as a free service) ( 1 2 3 4 5 ... Last Page) paulunderwood	2023-05-17 12:57 by paulunderwood	130	7,920
PRP Test for Wagstaff and Mersenne prime ? kijinSeija	2023-05-14 20:34 by kijinSeija	6	1,095
Sieve Wheel ( 1 2) User140242	2023-04-22 13:09 by User140242	12	4,457

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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