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Forum: MattcAnderson 2022-11-04, 06:32
Replies: 21
Views: 2,812
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: MattcAnderson 2022-07-20, 17:14
Replies: 21
Views: 2,812
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: MattcAnderson 2022-07-02, 00:20
Replies: 21
Views: 2,812
Posted By MattcAnderson
Thumbs up This is it. Good times Look ...

This is it.
Good times
Look




58375189765560121426618297669679<32>
Factor already known
Found 2 factors and 0 ECM/P+1/P+1 results.
Forum: MattcAnderson 2022-05-30, 09:39
Replies: 21
Views: 2,812
Posted By MattcAnderson
I tried, unsuccessfully, to download yafu on my...

I tried, unsuccessfully, to download yafu on my Windows computer. So I used Maple again.

850 seconds of computer time to do the 10 factorizations. So that's 14 minutes. plus the time it took me...
Forum: MattcAnderson 2022-05-29, 10:28
Replies: 21
Views: 2,812
Posted By MattcAnderson
I did 3 factorizations tonight. I used Maple and...

I did 3 factorizations tonight. I used Maple and it took 242 seconds. I know yafu is faster.
The composite numbers have 71 digits so 3 separate C71.

> ifactor((10^77-902097)*(1/4617559));...
Forum: MattcAnderson 2022-02-22, 23:17
Replies: 21
Views: 2,812
Posted By MattcAnderson
I appreciate the suggestions, kar_bon and EdH. ...

I appreciate the suggestions, kar_bon and EdH.
For some reason, I prefer Maple, under a Windows platform.
It is easier for me to use.

At least you looked at my blog. You both get an A+.

I am...
Forum: MattcAnderson 2022-02-22, 08:37
Replies: 21
Views: 2,812
Posted By MattcAnderson
More factordb.com

Hi again all,

> ifactor(12728090287417836575217719014652994601005209080166443917625601931139);
(23) (71) (79) (97) (101) (103) (127) (131) (157) (251) (307) (311) (331) (449)

(523) (661)...
Forum: MattcAnderson 2022-02-22, 04:51
Replies: 21
Views: 2,812
Posted By MattcAnderson
Matt's factordb.com session tonight

I know you all are eager to see this.
For a laugh, see reddit.com/r/softwaregore

This is code gore.

# My comments were lost in translation, so you see "NULL".
> NULL;
>...
Forum: MattcAnderson 2021-09-23, 10:34
Replies: 21
Views: 2,812
Posted By MattcAnderson
Smile more calculations

Hi again all,

I have probably done over 50 quick calculations for factordb.com. In My Humble Opinion, this is a useful database. Now we know that a C74 is a P22 times a P24 times a P29. ...
Forum: MattcAnderson 2021-08-17, 04:20
Replies: 21
Views: 2,812
Posted By MattcAnderson
Hi all, I have been doing several requested...

Hi all,

I have been doing several requested integer factorizations for factordb.com.

Some composites are semi-primes, that is of the form composite = prime1 * prime2.

My last one was
...
Forum: MattcAnderson 2021-08-15, 00:21
Replies: 21
Views: 2,812
Posted By MattcAnderson
Smile Hi again all, My latest factordb.com...

Hi again all,

My latest factordb.com contribution about prime factorization of
integers (that took 1612 seconds on my rig) is
...
Forum: MattcAnderson 2021-08-14, 15:33
Replies: 21
Views: 2,812
Posted By MattcAnderson
Smile some factor D B results

Hi all,

I enjoy giving results to factordb.com

Some interesting details are in this attachment

Cheers

Matt
Forum: MattcAnderson 2021-06-15, 16:57
Replies: 21
Views: 2,812
Posted By MattcAnderson
Now an previously unknown C83 is a P36 times a...

Now an previously unknown C83 is a P36 times a P48

To show

38146669211999441488164746438552634539130258479280936639266759628326547189425577797<83>

134954146509066228002222828521591151<36> ·...
Forum: MattcAnderson 2021-06-15, 08:29
Replies: 21
Views: 2,812
Posted By MattcAnderson
Now a C67 ...

Now a C67

2878189567560747844730239605664433489522492631397317607235068302073

so interesting

and useful in at least 3 millennia as we continue to colonize Mars.

good mathematical trivia
Forum: MattcAnderson 2021-06-15, 07:57
Replies: 21
Views: 2,812
Posted By MattcAnderson
Found a C70 ...

Found a C70

5251595955542976485924773357619648101146114174676995076345134370657229

away from keyboard

3721001974321543266672687967*(22424797223486196447937965793*62936542414259)

P14 * P28...
Forum: MattcAnderson 2021-06-15, 07:34
Replies: 21
Views: 2,812
Posted By MattcAnderson
Thumbs up Matt vs factordb

Tonight I found that a C75 is a P32 times a P44.

It required 165.14 seconds of computer time,
Using Maple 13 student version
and my computer is
Windows 7 Home Premium, service pack 1
(stable...
Showing results 1 to 16 of 16

 
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