Add 13 more and post it forever.

bobbym · 2010-04-28 03:27:17

3575 = 2^3 + 3^3 + 7^3 + 10^3 + 17^3

ZHero · 2010-04-28 03:29:53

phrontister wrote:

3562
This is post #274
2 + 7 + 4 = 13....and 3562/13 = 274.

OUTSTANDING

bobbym · 2010-04-28 03:33:41

3588 = 1^3 + 2^3 + 2^3 + 8^3 + 11^3 + 12^3

phrontister · 2010-04-28 03:41:50

3601
3614
3627

3627...36 & 27: the first occurrence of consecutive multiples of 9 so far.

And 36 - 27 = 9!!!

Last edited by phrontister (2010-04-28 03:43:01)

bobbym · 2010-04-28 03:42:12

Hi phrontister;

I am not getting a 3549 at position 12878 but at position 13085, I do.

ZHero · 2010-04-28 03:53:45

3640

3653

3666: First occurrence of Devil's number 666 hence is a 3D number

phrontister · 2010-04-28 03:58:58

Hi Bobby,

Your 3497 position at 12878 was correct, so you must have put in that same number again into your program instead of 3549. Anyway, 12878 + (3549-3497)*4 = 13086, not 13085.

I'll skip this round...to keep pace with the post# x 13 'rule'.

ZHero wrote:

First occurrence of Devil's number 666 hence is a 3D number

666 is also a 'Smith' number, and if the letters of that name are ascribed a value corresponding to their position in the alphabet (ie, a=1, b=2......z=26), the sum of those values is 69, which is a right or left 180° rotatable number.

Last edited by phrontister (2010-04-28 04:29:01)

bobbym · 2010-04-28 04:01:02

3679

Hi phrontister;

How does this look?

phrontister · 2010-04-28 04:16:11

, Bobby. I don't check them all...just some sometimes. I don't know what the last two mean, but I've worked out how to check the others. The second and third constants had me stumped for a while.

3692

3 June 1992 converts to 33758 in Excel 'date-time code'.

3+3+7 = 13, and 5 + 8 = 13.

Last edited by phrontister (2010-04-28 04:31:48)

bobbym · 2010-04-28 04:22:14

3705 = 26^2 + 28^2 + 33^2 + 34^2

ZHero · 2010-04-28 04:33:21

phrontister wrote:

666 is also a 'Smith' number ...

hey! sure?
the First Letter of my name is "M" (the 13th Letter) and the First 4 (=1+3) Letters are "mith" --->Here!
nice coincidence!

phrontister wrote:

... the sum of those values is 69, which is a right or left rotatable number ...

LOL

Last edited by ZHero (2010-04-28 04:48:09)

ZHero · 2010-04-28 04:58:36

bobbym · 2010-04-28 05:22:58

3744 = 12^2 + 36^2 + 48^2

3744 = 6^3 + 11^3 + 13^3

3744 = 10^3 + 14^3

phrontister · 2010-04-28 11:44:29

ZHero wrote:

hey! sure?

Mathworld:

A Smith number is a composite number the sum of whose digits is the sum of the digits of its prime factors (excluding 1). (The primes are excluded since they trivially satisfy this condition). One example of a Smith number is the beast number
666 = 2*3*3*37
since
6+6+6 = 2+3+3+(3+7) = 18

Then there are the Smith relatives, which are consecutive numbers that are also Smith numbers :
Smith brothers: eg, 728, 729
Smith triples: eg, 73615,73616,73617
Smith quads: eg, 4463535, 4463536, 4463537, 4463538
...etc.

Of course, the term 'Smith brothers' is not strictly correct, because, according to this article by that prolific writer, Anon Y. Mous, "all odd numbers are 'masculine' and all even numbers 'feminine' ", meaning that consecutive number gender alternates.

ZHero wrote:

the First Letter of my name is "M" (the 13th Letter) and the First 4 (=1+3) Letters are "mith"

So you're related to the Smith family too?! Though distantly, as it seems to be in name only.

3757

3757 occurs at position 511 of concatenated consecutive Smith triangular numbers, whose string commences with the first such number.

AND, even furthermore still(!)......3757-511=3246 (ie, 2*3*541), which is also a Smith number:
3+2+4+6 = 2+3+5+4+1 = 15

Last edited by phrontister (2010-04-28 15:56:16)

bobbym · 2010-04-28 12:09:51

3770

ZHero · 2010-04-29 18:35:13

3783:

Last edited by ZHero (2010-04-29 18:46:18)

bobbym · 2010-04-29 19:58:35

3796

ZHero · 2010-04-29 23:14:11

3809

bobbym · 2010-04-30 13:08:56

3822

The string of digits 3, 8, 2, 2 appears in:

phrontister · 2010-04-30 22:18:24

ZHero wrote:

3809

Nice thought!

But isn't 2 the least prime number?

3835

-3+8+3+5 = 13

Last edited by phrontister (2010-04-30 22:19:59)

bobbym · 2010-04-30 22:35:33

3488

A magic square with a magic sum of 3488!

Hi phrontister;

Power towers are read from the top down. So:

3^8^0^9 is read like this 0^9 = 0. 8^0 = 1. 3^1 = 3

This is the general convention, although I have seen some calculators and even a famous math package go from the bottom up!

ZHero · 2010-04-30 23:05:37

phrontister wrote:

But isn't 2 the least prime number?

Of Course IT IS!!
Moreover, its the Only Lonely EVEN PRIME number Known So Far (shame if we still can't find one more within next decade )!

bobbym wrote:

3488

3848

Last edited by ZHero (2010-04-30 23:07:19)

phrontister · 2010-05-01 00:40:36

bobbym wrote:

Power towers are read from the top down.

Oops! I did know that. <blush>. Thanks for pointing that out, Bobby. My mind was in neutral at the time and I read them from the bottom up.

ZHero wrote:

Moreover [2 is]...the Only Lonely EVEN PRIME number Known So Far (shame if we still can't find one more within next decade )!

It will happen.
(a) Technological advancement is only in its infancy; and
(b) words are constantly changing...see this Victor Borge video, with Dutch subtitles (after watching the video you'll understand that the subtitles are actually in double Dutch).

MathWorld:

The unique even prime number 2. All other primes are odd primes. Humorously, that means 2 is the "oddest" prime of all.
The sequence 2, 4, 6, 10, 14, 22, 26, 34, 38, ... (Sloane's A001747) consisting of the number 2 together with the primes multiplied by 2 is sometimes also called the even primes, since these are the even numbers n = 2k that are divisible by just 1, 2, k, and 2k.

3861 (catch-up)

3874

3874 = 4985 (a Victor Borge number), whose digit sum is 26 (ie, 13 + 13).

Last edited by phrontister (2010-05-01 00:54:33)

bobbym · 2010-05-01 01:05:28

3887

Another magic square that all the rows, columns and diagonals sum to 3887.

How the heck can you know about Victor Borge?

phrontister · 2010-05-01 01:28:15

bobbym wrote:

How the heck can you know about Victor Borge?

I've got several of his vinyl LPs, a treasured possession passed down to me from my great grandfather. Or maybe I found them in an op shop...I don't recall now.

3900

Ka-ching! (13 + 13 + 13)*100

Last edited by phrontister (2010-05-01 01:35:41)

Math Is Fun Forum

#276 2010-04-28 03:27:17

Re: Add 13 more and post it forever.

#277 2010-04-28 03:29:53

Re: Add 13 more and post it forever.

#278 2010-04-28 03:33:41

Re: Add 13 more and post it forever.

#279 2010-04-28 03:41:50

Re: Add 13 more and post it forever.

#280 2010-04-28 03:42:12

Re: Add 13 more and post it forever.

#281 2010-04-28 03:53:45

Re: Add 13 more and post it forever.

#282 2010-04-28 03:58:58

Re: Add 13 more and post it forever.

#283 2010-04-28 04:01:02

Re: Add 13 more and post it forever.

#284 2010-04-28 04:16:11

Re: Add 13 more and post it forever.

#285 2010-04-28 04:22:14

Re: Add 13 more and post it forever.

#286 2010-04-28 04:33:21

Re: Add 13 more and post it forever.

#287 2010-04-28 04:58:36

Re: Add 13 more and post it forever.

#288 2010-04-28 05:22:58

Re: Add 13 more and post it forever.

#289 2010-04-28 11:44:29

Re: Add 13 more and post it forever.

#290 2010-04-28 12:09:51

Re: Add 13 more and post it forever.

#291 2010-04-29 18:35:13

Re: Add 13 more and post it forever.

#292 2010-04-29 19:58:35

Re: Add 13 more and post it forever.

#293 2010-04-29 23:14:11

Re: Add 13 more and post it forever.

#294 2010-04-30 13:08:56

Re: Add 13 more and post it forever.

#295 2010-04-30 22:18:24

Re: Add 13 more and post it forever.

#296 2010-04-30 22:35:33

Re: Add 13 more and post it forever.

#297 2010-04-30 23:05:37

Re: Add 13 more and post it forever.

#298 2010-05-01 00:40:36

Re: Add 13 more and post it forever.

#299 2010-05-01 01:05:28

Re: Add 13 more and post it forever.

#300 2010-05-01 01:28:15

Re: Add 13 more and post it forever.

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