Archive for month: June, 2009

YAFU factors a 100 digit number for me…

June 29, 2009 | Math | By: Mark VandeWettering

On Friday, I left YAFU factoring a 100 digit number. I returned to find that it had discovered: 57790 93002 97410 10009 81807 59480 96292 62385 64081 79034 01512 68667 60949 55202 41611 02063 00992 86747 29621 36069 = 85404 41503 10330 70274 85067 33621 20528 36393 71759 33321 * 67667 37996 94567 83271 38746 […]

On Factoring, by Jevons’ The Principles of Science

June 28, 2009 | Math | By: Mark VandeWettering

While reading the section on factorization of large numbers in Knuth’s Seminumerical Algorithms, I encountered a reference to an interesting claim by William Stanley Jevons. I did a google search, and found it in google books: Knuth was quick to point out that the number that he gave was easily factorable in short order (even […]

A Simple Python Program for Factoring…

June 28, 2009 | Computer Science, Cryptography, Math | By: Mark VandeWettering

Sometimes, your interests converge. Over on Programming Praxis, he had a coding challenge to implement Monte Carlo factorization. The last couple of days, I have been thinking a bit more about factorization, so it seemed like a good idea to give it a whack. I cribbed a version of the Rabin Miller primality tester off […]

Use a Wii Balance Board with Linux

June 28, 2009 | General | By: Mark VandeWettering

An interesting part of the Nintendo Wii design is that they rely on bluetooth for connecting their joysticks and (as it turns out) their Balance Board peripheral. This makes them pretty darned hackable. I’ve seen lots about using the “WiiMote” with computers, but this is the first I’ve seen that interfaces with the Balance Board. […]

Factoring Large Numbers…

June 27, 2009 | General | By: Mark VandeWettering

A few days ago, I mentioned that I was pondering the stages of Simon Singh’s Cipher Challenge that I didn’t complete “back in the day”. I was examining the DES portion, which still seems like it would take a while to solve, so I decided to skip ahead and figure out what the final stage […]

Looking back at Michael Jackson

June 25, 2009 | General | By: Mark VandeWettering

Today came the news that Michael Jackson, the legendary King of Pop, died of cardiac arrest at age 50. Yes, I was a fan. Who wasn’t in the eighties? He was absolutely brilliant. He brought the combination of music, choreography, and film making together to completely change the landscape of pop music and television. As […]

Magic Lantern Firmware for the Canon 5D

June 24, 2009 | Photography | By: Mark VandeWettering

I’m a huge fan of gadgets which have the possibility of open source third party updates. I have a couple of Linksys routers that I’ve reflashed with DDWRT and/or Tomato and/or OpenWRT. I’ve played with the NSLU2. I have a Canon SD1100 which I run CHDK. Today, I discovered another interesting one: Magic Lantern Firmware […]

Mmm… Cobbler

June 23, 2009 | General | By: Mark VandeWettering

I like cooking. Well, eating really. Okay, eating and cooking. But in particular, I like what is generally called comfort food. The silly thing about most restaurants is that they don’t do a very good job of making comfort food. If you really want comfort food, the best way is to learn how to make […]

Taking my own code challenge…

June 22, 2009 | Cryptography | By: Mark VandeWettering

Back in 2007, I made a blog post entitled “Code Challenge”, where I put forth a code challenge. Code Challenge | brainwagon. Nobody took the challenge. But what was slightly odder was that I had no recollection of making this challenge, or even what type of cipher it was. The only clue that I had […]

iPhone 3GS: My Early Experience

June 21, 2009 | General | By: Mark VandeWettering

Well, my iPhone 3GS arrived on Friday, and I’ve had a couple of days of tinkering with it, so I thought I’d give my impressions about what’s cool. First off, it’s a G3 phone (I previously had the first generation, EDGE only phone) so it’s networking is significantly faster. Combined with the processor speed increase, […]

Revisiting Simon Singh’s Cipher Challenge…

June 19, 2009 | Cryptography | By: Mark VandeWettering

The other day, my friend Jeff sent me an email detailing the latest benchmarking of his new 8 core Intel box. He had written a program to compute return rates for all possible draws in video poker. A few years ago, this program had taken a month of computer time to complete, and he wondered […]

No early iPhone joy in Mudville

June 17, 2009 | General | By: Mark VandeWettering

The blogosphere was atwitter with the news that many iPhone 3GSs seemed to have shipped early, and indeed might be delivered early. I checked mine, and found that it had indeed arrived in Anchorage yesterday afternoon, but alas, checking it’s status today online met me with the following screen on UPS’s website: So, it looks […]

10m opening up perchance?

June 15, 2009 | Amateur Radio | By: Mark VandeWettering

I haven’t really been monitoring 10m very much, but I’ve been hearing more about activity there, so I tuned up tonight and caught VE7MTY/B coming in pretty darned well. Check out the .mp3 file: VE7MTY/B, received from CM87ux, 2009-06-15, around 8:00PM local

NOAA Satellite Frequencies

June 15, 2009 | Amateur Satellite, Space | By: Mark VandeWettering

I haven’t been goofing around much with receiving APT weather satellite data, but I was going to try to record some passes now that the days are longer and we get more daylight passes over North America. But I hadn’t programmed the frequencies into my radio, and was forced to look them up. So, here […]

Matt Blaze: Security and Human Behavior 2009

June 14, 2009 | Computer Science, Cryptography, Security | By: Mark VandeWettering

For all the people who’ve come to see this as my ham radio blog, I apologize, but I do have other interests, and computer security is one of them. It’s not that I am any kind of expert, but I have played around quite a bit with various bits of computer security and cryptography over […]