Number Choosing Contest.

we're taking this round all the way to post number 736

736:: the number which is the answer

is the number 736

the number is 736

the answer includes 736 certainly

here comes 736!

736 is one of the numbers that you are looking for

(TWO SCORE AND SIXTEEN) SCORE AND SIXTEEN

736: breaks XZ

736: the number that you are looking for

we're taking this round all the way to post number 736

736: breaks *AAAAAAAAAAAAAAAAAAAAAAA* Z

736:: the number which is the answer

is the number 736

the number is 736

the answer includes 736 certainly

here comes 736!

736: breaks *AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA* Z
736: breaks Z
736: breaks Z
736: breaks Z
736: breaks Z

736 is one of the numbers that you are looking for

!!!!!!YES!!!!!!

I have never regretted a single word so much in my life.

W: the number must be a positive integer
X: the number itself must be represented in base 10 Arabic numerals
Y: the number must have at least two formatting tags applied to it
Z: number must be presented with or by a TRUE fact about said number expressed in words

1: must have a Collatz Conjecture stopping time of at most 20
2: must be a happy number
3: must have a base-36 representation consisting only of letters
4: must have a composite number of prime factors
5: the decimal representation of its reciprocal must be periodic, with said period being at least 10

(there are precisely two numbers that pass all of the above rules, 736 & 40960, hence why "the answer is 736" was giving me kittens)

(posts akin to "the answer is ௭௩௬" passed Z technically because it is a fact that 736 is represented by those characters in that system)

Sruixan and Ixcaliber have ceded the next round to me.

In light of that, here are the instructions:

A number which is presented clearly will return either a response or an indication of failure with an explanation of failure.

The first number to return back exactly

Hello world!

Will pass.

13!!!!

13!!!!

13: [no response]

736

1543

721011081081113211911111410810033

"I'm slightly concerned about my computer catching fire if I type in a certain type of number" - Kaynato, regarding this current contest.

736

1543

721011081081113211911111410810033

736: No response

1543: No response

721011081081113211911111410810033: No response

ABCDE

ABCDE

ABCDE_16: 0

72-69-76-76-79

72-69-76-76-79

7269767679_10: [no response]

D base 16

D base 16

D_16: [no response]

e

i

π

1

0

7777777

ABCDF_16

ABCDEF_16

EDCBA_16

48656C6C6F20776F726C6421_16

e

i

π

1

0

e (truncated due to size):
Entered:

SpoilerShow

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

Output: [no response]

i: Invalid input.

π (truncated due to size):
Input:

SpoilerShow

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

Output: 00000

1: [no response]
0: [no response]

7777777

7777777_10: 0

ABCDF_16

ABCDEF_16

EDCBA_16

ABCDF: 0

ABCDEF: 0

EDCBA: 0

48656C6C6F20776F726C6421_16

48656C6C6F20776F726C6421: [no response]

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https://en.wikipedia.org/wiki/Happy_number

Also - Sruixan is on the right path.

Pi's decimal representation, entered in hex. (aka 3.1415926535897932384626433832795028841971693993...₁₆)