Nobody factors large primes, because they're, well, prime. What public key crypto depends on is factoring a large number into its two prime factors. That's what you meant, and that is still a computationally difficult problem.
Not so hard to believe. It's not the random chance of a roving laser beam accidentally falling "just right" on the chopper. Anybody trying to do this will easily use the visual feedback from the fine but very visible beam of light to aim and adjust it to shine on the target - especially a slow and predictably moving target like a helicopter. The human eye-brain system is great at this sort of thing. WW-II fighter pilots effectively used tracer fire to correct their aim and bring down rapidly maneuvering foes. Searchlight operators on the ground were able to illuminate individual planes flying at 10,000 - 20,000 feet while the pilots tried to maneuver out of the beam.
Most of these ghost calls arrive because the automated dial systems telemarketers use dial several calls at once, and the first one that answers gets patched to the telemarketing stooge, while others that answer a few seconds later give that spooky silence for 5-10 seconds before they are hung up. The system logs the fact that you answered. Don't worry -- they'll call back to give you some love later.
Thank you for serving, man. It's a tough job that's not appreciated by everybody -- witness some of these comments. But we all benefit from the sacrifices and awesome efforts of our military, and for that I am grateful.
It took Verizon approx 1 year to offer service after they laid the network cable through my front yard in northern VA . Now they are offering 5Mb/2Mb basic and 15Mb/2Mb 'premium' service, which exactly matches Cox's offerings here. But Verizon explains that they are serving clean, shiny laser bits -- not like those old, corroded copper bits that Cox serves up!
I still have my trusty K&E (Keuffel and Esser) Deci-Trig sliderule http://www.sphere.bc.ca/test/slide8/260-ke-slides.jpg/ - the one at the top - that my grandfather gave me as a high school graduation present. Really nice piece. Served me very well throughout college physics and chemistry courses. I also had a nice Japanese circular sliderule, but I have since misplaced it.
Both of these lost face time when I bought an HP-67 programmable calculator...
The primary driver for NASA's decision is the fact that the replacement for the aging Hubble is the much improved Webb telescope, which is already under construction and scheduled for launch in 2011. Webb will have a 6.5-meter diameter segmented main mirror made from berillium, compared with Hubble's 2.4-meter glass mirror, giving it more than 7 times the light gathering power of hubble and improving its resolution by nearly a factor of 3. So NASA's choice is to save the $$-billions that a Hubble fix-up mission would cost and accept the risk that Hubble will go down a couple of years before the Webb telescope is deployed in 2011.
Seems like a pretty good decision to me.
Earthbound telescopes are fundamentally limited by atmospheric turbulence, which causes the familiar 'twinkling' you can see with the naked eye. Spaceborne scopes, despite their cost and servicing difficulties, are the way to go.
Thomas Jefferson High School for Science and Technology is a science magnet school in the northern Virginia suburbs. It has 3-hr competitive admission test where each year 3,000 kids compete to fill 400 admission slots. The average SAT score (on the old 1600-pt SAT) was 1490. Last year, there were over 140 National Merit Scholarship finalists out of 400 seniors. About 15 years ago, their math team won a national math competition, and won a Cray system for the school - installed in the school and used by students. Football team sucks, though.
UVa's not a slouch school, either. Maybe not MIT, but is always ranked in the top 10-15 public universities in the country.
RAID-1 does nothing for you to protect against deleted files, nor effects of malware. Nor can the mirrored disk be taken off site. RAID mirroring only protects against the failure of the disk hardware. I use Ghost to backup to an external USB disk. Ghost has a built in option to split the backup into DVD-sized files if you wish, which are easy to burn. Best of all, the Ghost CD is bootable, so if Windows becomes unbootable, you can boot from the Ghost CD and directly restore from the drive image you saved on either USB disk or DVD. Good stuff.
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Nobody factors large primes, because they're, well, prime. What public key crypto depends on is factoring a large number into its two prime factors. That's what you meant, and that is still a computationally difficult problem.
339/108 is not near good enough. For a good time, try 355/113... gets you 7 significant figures of pi.
Not so hard to believe. It's not the random chance of a roving laser beam accidentally falling "just right" on the chopper. Anybody trying to do this will easily use the visual feedback from the fine but very visible beam of light to aim and adjust it to shine on the target - especially a slow and predictably moving target like a helicopter. The human eye-brain system is great at this sort of thing. WW-II fighter pilots effectively used tracer fire to correct their aim and bring down rapidly maneuvering foes. Searchlight operators on the ground were able to illuminate individual planes flying at 10,000 - 20,000 feet while the pilots tried to maneuver out of the beam.
Most of these ghost calls arrive because the automated dial systems telemarketers use dial several calls at once, and the first one that answers gets patched to the telemarketing stooge, while others that answer a few seconds later give that spooky silence for 5-10 seconds before they are hung up. The system logs the fact that you answered. Don't worry -- they'll call back to give you some love later.
Thank you for serving, man. It's a tough job that's not appreciated by everybody -- witness some of these comments. But we all benefit from the sacrifices and awesome efforts of our military, and for that I am grateful.
AMEN brother!
It took Verizon approx 1 year to offer service after they laid the network cable through my front yard in northern VA . Now they are offering 5Mb/2Mb basic and 15Mb/2Mb 'premium' service, which exactly matches Cox's offerings here. But Verizon explains that they are serving clean, shiny laser bits -- not like those old, corroded copper bits that Cox serves up!
I still have my trusty K&E (Keuffel and Esser) Deci-Trig sliderule http://www.sphere.bc.ca/test/slide8/260-ke-slides.jpg/ - the one at the top - that my grandfather gave me as a high school graduation present. Really nice piece. Served me very well throughout college physics and chemistry courses. I also had a nice Japanese circular sliderule, but I have since misplaced it. Both of these lost face time when I bought an HP-67 programmable calculator...
The primary driver for NASA's decision is the fact that the replacement for the aging Hubble is the much improved Webb telescope, which is already under construction and scheduled for launch in 2011. Webb will have a 6.5-meter diameter segmented main mirror made from berillium, compared with Hubble's 2.4-meter glass mirror, giving it more than 7 times the light gathering power of hubble and improving its resolution by nearly a factor of 3. So NASA's choice is to save the $$-billions that a Hubble fix-up mission would cost and accept the risk that Hubble will go down a couple of years before the Webb telescope is deployed in 2011. Seems like a pretty good decision to me. Earthbound telescopes are fundamentally limited by atmospheric turbulence, which causes the familiar 'twinkling' you can see with the naked eye. Spaceborne scopes, despite their cost and servicing difficulties, are the way to go.
Thomas Jefferson High School for Science and Technology is a science magnet school in the northern Virginia suburbs. It has 3-hr competitive admission test where each year 3,000 kids compete to fill 400 admission slots. The average SAT score (on the old 1600-pt SAT) was 1490. Last year, there were over 140 National Merit Scholarship finalists out of 400 seniors. About 15 years ago, their math team won a national math competition, and won a Cray system for the school - installed in the school and used by students. Football team sucks, though. UVa's not a slouch school, either. Maybe not MIT, but is always ranked in the top 10-15 public universities in the country.
RAID-1 does nothing for you to protect against deleted files, nor effects of malware. Nor can the mirrored disk be taken off site. RAID mirroring only protects against the failure of the disk hardware. I use Ghost to backup to an external USB disk. Ghost has a built in option to split the backup into DVD-sized files if you wish, which are easy to burn. Best of all, the Ghost CD is bootable, so if Windows becomes unbootable, you can boot from the Ghost CD and directly restore from the drive image you saved on either USB disk or DVD. Good stuff.