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Forum: MattcAnderson 2022-12-02, 06:05
Replies: 2
Views: 425
Posted By MattcAnderson
I was wrong. See maple worksheet showing that ...

I was wrong. See maple worksheet showing that
the 19-tuple
622803914376064301858782434517+d
is prime for d in [0, 4, 6, 10, 12, 16, 24, 30, 34, 40, 42, 46, 52, 54, 60, 66, 70, 72, 76]

Have a...
Forum: Puzzles 2022-11-20, 01:52
Replies: 66
Views: 2,684
Posted By MattcAnderson
Smile (2*10^n - 11)/9 is a prime number for n=4, 18,...

(2*10^n - 11)/9 is a prime number for n=4, 18, 100, 121, ...
so the number 2221 is a prime number as well as others.

Cheers
Forum: Puzzles 2022-11-17, 23:56
Replies: 66
Views: 2,684
Posted By MattcAnderson
Post I task myself to find prime numbers of the form...

I task myself to find prime numbers of the form 222...21 or 222...27
See Maple output.
Forum: MattcAnderson 2022-11-17, 21:40
Replies: 31
Views: 2,135
Posted By MattcAnderson
I found a thing

Since I have a handy dandy tool that can deal with large integers (Maple Software)
I have found a 121 digit prime.

> temp :=...
Forum: MattcAnderson 2022-11-17, 15:20
Replies: 31
Views: 2,135
Posted By MattcAnderson
Smile Primes as not a possible numerical anagram ......

Primes as not a possible numerical anagram ... interesting
Here is some simple minded Maple code. The hardest part was counting all the 2s.

> for a from 2 by 2 to 100 do
if...
Forum: MattcAnderson 2022-11-04, 06:32
Replies: 21
Views: 2,832
Posted By MattcAnderson
Smile more factordb.com exercises

Hi all, thought I would document some excercises for factordb.com tonight.
These are composite numbers without known factors,
that is, until I find those factors. Seems like an unending quest for...
Forum: Homework Help 2022-09-22, 21:28
Replies: 4
Views: 1,415
Posted By MattcAnderson
Smile Also, I did a Google search for "CDF normal...

Also,
I did a Google search for "CDF normal distribution"
I got this link
https://www.probabilitycourse.com/chapter4/4_2_3_normal.php

Have a nice day.
Matt
Forum: Homework Help 2022-09-22, 18:23
Replies: 4
Views: 1,415
Posted By MattcAnderson
Smile Hi Sticky and others, A Gaussian...

Hi Sticky and others,

A Gaussian distribution, or bell curve can be characterized by two variables.
First is its mean, or center value.
Second is its standard distribution, or wideness.

See...
Forum: MattcAnderson 2022-09-18, 01:15
Replies: 0
Views: 217
Posted By MattcAnderson
Smile Fibonacci doubling expression

Many of us are familiar with the Fibonacci sequence.
It is defined as F(n) = F(n-1) + F(n-2)
with F(1) = 1 and F(2) = 1.

The Lucas has the same recurrence relation, with initial conditions
of...
Forum: MattcAnderson 2022-09-17, 04:01
Replies: 1
Views: 261
Posted By MattcAnderson
Smile Stand-Up Math{s}

Hi again all,
Matt Parker has a YouTube channel called standupmaths.
It is entertaining to me.
Do a YouTube.com search for standupmaths if you are interested.
In America we say 'math'. In parts...
Forum: Information & Answers 2022-08-29, 02:24
Replies: 40
Views: 4,686
Posted By MattcAnderson
Smile Admissable prime k-tuple checker

Hi all,
I found a web-page that seems to be germane to this discussion.
Chris Caldwell has his 'prime pages' with University of Tennessee at Martin.
see this link.
...
Forum: Lounge 2022-08-19, 04:16
Replies: 26
Views: 5,546
Posted By MattcAnderson
Smile Hi again friends and everyone, I enjoy reading...

Hi again friends and everyone,
I enjoy reading and posting at mersenneforum.org and participating in distributed computing projects.
I live in Keizer, Oregon, USA. I'm a Navy Veteran, retired...
Forum: MattcAnderson 2022-08-16, 20:20
Replies: 2
Views: 425
Posted By MattcAnderson
Smile 19- tuple search

There is, currently, no known 19-tuple with pattern
[0, 4, 6, 10, 12, 16, 24, 30, 34, 40, 42, 46, 52, 54, 60, 66, 70, 72, 76]
I wrote some attached search code, but I think it is too slow.
from...
Forum: Information & Answers 2022-08-16, 09:41
Replies: 40
Views: 4,686
Posted By MattcAnderson
Smile I don't know of a good software for searching for k-tuples

I wrote some Maple code to find the smallest few k-tuples for
k= 7,8,9,10,11,12,13. back in 2015
My Maple code and some prime k-tuples appear in OEIS.org
Dana Jacobsen and Norman Luhn have...
Forum: MattcAnderson 2022-07-20, 17:14
Replies: 21
Views: 2,832
Posted By MattcAnderson
Smile today's factordb session

Today I learned that
(10^79-253653)*(1/63408193995913273) <63>
equals
1240407261075014928350683*127142374043023096518690934457531891833

in other words, we start with a Composite number (C) and...
Forum: sweety439 2022-07-20, 17:12
Replies: 9
Views: 1,126
Posted By MattcAnderson
Smile Interesting observation Sweety439. Have a...

Interesting observation Sweety439.

Have a nice day.
Matt
Forum: MattcAnderson 2022-07-18, 08:34
Replies: 160
Views: 58,212
Posted By MattcAnderson
Smile There is an oeis sequence for the densest...

There is an oeis sequence for the densest k-tuples (or width of prime constellations).
See oeis.org/A8407
pairs have minimum separation 2 so twin primes
3-tuples have pattern (0,2,6) or (0,4,6) so...
Forum: Math 2022-07-18, 08:10
Replies: 2
Views: 863
Posted By MattcAnderson
Smile The bounded gaps between primes theorem can be...

The bounded gaps between primes theorem can be seen here.
https://asone.ai/polymath/index.php?title=Bounded_gaps_between_primes

The best result is that there are an infinite number of pairs of...
Forum: MattcAnderson 2022-07-10, 02:49
Replies: 31
Views: 2,135
Posted By MattcAnderson
Thumbs up appreciate your efforts

appreciate your efforts
Forum: MattcAnderson 2022-07-10, 01:42
Replies: 15
Views: 12,099
Posted By MattcAnderson
Thumbs up check it out https://oeis.org/A000062 This...

check it out
https://oeis.org/A000062
This one involves a Beatty sequence Betty :--(


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A000064 Partial sums of...
Forum: MattcAnderson 2022-07-10, 01:12
Replies: 15
Views: 12,099
Posted By MattcAnderson
Smile the oeis.org is interesting

A look

A52 is also an excelent one. It involves alphabetical order.
https://oeis.org/A000052
Cheers
Forum: MattcAnderson 2022-07-10, 00:58
Replies: 31
Views: 2,135
Posted By MattcAnderson
Thumbs up Sounds good smile

Sounds good
smile
Forum: sweety439 2022-07-10, 00:25
Replies: 1
Views: 282
Posted By MattcAnderson
Thumbs up All possible Have a nice day In my world,...

All possible
Have a nice day

In my world, conjecture is like probably true
Forum: MattcAnderson 2022-07-10, 00:25
Replies: 31
Views: 2,135
Posted By MattcAnderson
Thumbs up All possible Have a nice day In my world,...

All possible
Have a nice day

In my world, conjecture is like probably true
Forum: MattcAnderson 2022-07-09, 20:33
Replies: 31
Views: 2,135
Posted By MattcAnderson
Thumbs up Have a nice day

Have a nice day
Showing results 1 to 25 of 1000

 
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