Forum: FactorDB
2020-12-20, 10:18
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Replies: 160
Views: 31,329
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Forum: FactorDB
2020-12-20, 08:29
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Replies: 160
Views: 31,329
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Forum: GPU Computing
2020-12-19, 19:30
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Replies: 27
Views: 1,440
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Forum: Math
2020-12-16, 10:29
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Replies: 16
Views: 882
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Forum: Miscellaneous Math
2020-12-10, 05:41
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Replies: 20
Views: 1,211
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Forum: Miscellaneous Math
2020-09-04, 07:05
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Replies: 1
Views: 926
False, true or well known?
Given prime [$]p[/$] and [$]M_p = 2^p-1[/$]:
If [$]M_p-3[/$] is not a quadratic residue modulo [$]M_p[/$] then [$]M_p[/$] is composite.
Alternative, stronger version:
[$]M_p[/$] is prime iff...
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Forum: Miscellaneous Math
2020-08-16, 13:35
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Replies: 9
Views: 1,484
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Forum: Miscellaneous Math
2020-07-22, 08:11
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Replies: 57
Views: 12,473
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Forum: Miscellaneous Math
2020-06-23, 13:53
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Replies: 59
Views: 5,609
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Forum: Miscellaneous Math
2020-06-23, 12:20
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Replies: 59
Views: 5,609
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Forum: Miscellaneous Math
2020-06-18, 08:41
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Replies: 59
Views: 5,609
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Forum: Miscellaneous Math
2020-05-02, 12:37
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Replies: 6
Views: 989
I don't think the function in #1...
I don't think the function in #1 (https://www.mersenneforum.org/showpost.php?p=544439&postcount=1) qualifies as a Lissajous curve (https://en.wikipedia.org/wiki/Lissajous_curve).
The reason I see is...
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Forum: Miscellaneous Math
2020-05-02, 10:25
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Replies: 6
Views: 989
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Forum: Miscellaneous Math
2020-05-02, 10:23
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Replies: 6
Views: 989
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Forum: Miscellaneous Math
2020-05-02, 10:22
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Replies: 6
Views: 989
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Forum: Miscellaneous Math
2020-05-02, 10:20
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Replies: 6
Views: 989
Divisibility function
[$]\forall N \ne 0,\ x \in [1,\ N]: \ sin \, x \pi +\imath \, sin \frac{N \pi}{x} = 0 \leftrightarrow x|N.
[/$]
I'm not aware of any practical value, but I like the pictures, produced in Maxima...
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Forum: Forum Feedback
2020-01-31, 09:38
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Replies: 3
Views: 4,593
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Forum: Alberico Lepore
2019-12-02, 05:51
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Replies: 2
Views: 2,372
1. Remove your name from the title of every...
1. Remove your name from the title of every "paper" you write.
2. Do not use your name in the title of your posts.
3. Let people view/download the submission it directly, without requiring any...
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Forum: Forum Feedback
2019-07-26, 18:58
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Replies: 12
Views: 5,276
OK, so the "timeout" is about 7 years.
...
OK, so the "timeout" is about 7 years.
Joking aside, setting user's personal preferences without consent is rather unexpected,
diplomatically said. Whoever can fix the issue, please make it not...
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Forum: Forum Feedback
2019-07-26, 04:58
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Replies: 12
Views: 5,276
Avatar
Who and why gave me this unsolicited, childish avatar? I hope it's some kind of a mistake/glitch.
Otherwise I don't see it funny when admins abuse their powers.
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Forum: Miscellaneous Math
2019-07-26, 04:54
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Replies: 2
Views: 650
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Forum: Alberico Lepore
2019-05-24, 09:23
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Replies: 47
Views: 9,939
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Forum: Miscellaneous Math
2019-05-02, 19:28
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Replies: 247
Views: 14,527
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Forum: Miscellaneous Math
2019-05-02, 18:59
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Replies: 247
Views: 14,527
You have not brought any idea here. Only the...
You have not brought any idea here. Only the claims that you're a genius and that you're sure about primality of exponents that are actually composite so far.
Bring the ideas, share the formula.
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Forum: Miscellaneous Math
2019-05-02, 09:05
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Replies: 247
Views: 14,527
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