rlineker
Apr 18 2006, 07:26 AM
| | The largest triangular number with the same number to have yet been discovered is 666.
The First 100 Triangular Numbers
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rvalkass
Apr 18 2006, 08:10 AM
How can 666 possibly be a prime number? A prime number is a number divisible only by itself and 1, and 666 is divisible by 6, 3 and 2, and many other numbers. Do you mean that 666 is the largest triangle number with all the digits the same?
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anwiii
Apr 18 2006, 09:17 AM
QUOTE(rvalkass @ Apr 18 2006, 03:10 AM) 
How can 666 possibly be a prime number? A prime number is a number divisible only by itself and 1, and 666 is divisible by 6, 3 and 2, and many other numbers. Do you mean that 666 is the largest triangle number with all the digits the same?
haha i had to think twice on that one. i thought i may have forgotten my basic math from 30 years ago....WHEW....anyway, 666 is definately not a prime number. nor is any even # a prime # since they are all automatically divisable by 2 maybe he thought the # 666 was cool to post about and just wanted to increase his credits for webhosting. i am very curious where he got this information from.....
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PIPER-4-HIRE
Apr 18 2006, 05:03 PM
SHENNANIGANS!!!!!!!!!!!!!!!!!!!!!!!!!!!!! anwiii is right... several other #'s in the list are wrong as well.
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jlhaslip
Apr 18 2006, 05:08 PM
What is the definition of a Triangular Number? It has been a while since I have studied Math, so there must be a definition I am not aware of.
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rvalkass
Apr 18 2006, 05:25 PM
A triangular number is a number that can be arranged into an equilarteral triangle made up of that number of dots. For example, 3 can be made into a triangle, one dot above 2 dots. The next number is 6, a row of three dots below the previous ones. Wikipedia has some useful information.
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DaeFenris
Apr 18 2006, 09:04 PM
Ooooh fun. I love quirky math like that. I'm going to read that wiki info as soon as I get some free time.
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misere
Apr 25 2006, 08:01 PM
Right, I'm confused. Why would a triangular number have to be prime? 6 isn't prime, but it's a triangular number, too, with one dot in the first row, two in the second, and three in the third, to form an equilateral triangle.
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Kioku
Apr 26 2006, 07:51 PM
QUOTE(rlineker @ Apr 18 2006, 03:26 AM) The largest triangular number with the same number to have yet been discovered is 666. The First 100 Triangular Numbers First and foremostly, stop making up facts like "666" being such a thing for the sole sake of being " controversial". Secondly, check your facts. Alot of numbers are wrong there and I believe with today's modern technology and processing power, we'd have a higher triangular number than something in the six-hundred sixties, especially when we're able to genereate many digitted prime numbers as we are capable of doing as of now.
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mama_soap
Apr 27 2006, 08:09 AM
@misere: A triangular number need not be prime. Whoever made such an assertion?  @Kioku: I don't think the original poster was trying to claim that the hundered numbers listed here are all that are known to mankind *grin* Er... (s)he's probably trying to say that 666 is the largest triangular number to be composed of the same digits, or something like that. How far that is true, however, I have not been able to check *shrug* On the other hand, I don't think it's difficult to generate triangular numbers (if the definition is anything to go by). Definitely looks less trickier than primes, for instance.
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anwiii
Jun 14 2006, 07:53 AM
QUOTE(unicornrose @ May 31 2006, 06:06 AM) Okay after glancing at the information on Wikipedia I see that it is a sequence thing. I understand all of the numbers but 1. One does not make a triangle. Its just a dot. That is just plain silly. If someone could explain to me why one is considered a triangular number I would love to know. Now as far as the prime thing goes I don't know how anyone got out of the very first post that they were assuming that 666 was prime. Not once was there mentioned prime numbers. The person was simply asserting in the first 100 triangular numbers 666 is the largest that is all the same digets. the original post was edited to make other people look stupid the original post did specifically say "prime #'s"
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Johnny
Jun 14 2006, 03:30 AM
I think an easy way to find triangular numbers would be to add each number and the next one, it's hard to explain, but triangular numbers are like this: 1 + 2: 3 1 + 2 + 3: 6 1 + 2 + 3 + 4: 10 And so on, sort of like the bowling pins. Get it? So you can just keep adding numbers bigger than the last and the sum will always be a triangular number. So you can pretty much go on forever, provided you have the time to do so. (Man, I'm such a genius, I just thought that up.)
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Uentil
Jun 14 2006, 03:11 AM
unicornrose
May 31 2006, 11:06 AM
Okay after glancing at the information on Wikipedia I see that it is a sequence thing. I understand all of the numbers but 1. One does not make a triangle. Its just a dot. That is just plain silly. If someone could explain to me why one is considered a triangular number I would love to know. Now as far as the prime thing goes I don't know how anyone got out of the very first post that they were assuming that 666 was prime. Not once was there mentioned prime numbers. The person was simply asserting in the first 100 triangular numbers 666 is the largest that is all the same digets.
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amhso
May 30 2006, 07:33 PM
im not completely understanding this. so 10 is a triangle number?
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