3
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To demystify me, look and say. Then paint me not with colors but with array.

11131b4d1c
11121015211514
11121015211514
11121015211514
11121015211514
111318193d1c
111019101534
111019101534
111019101534
111019101534
111019101534
111319113d1c

I am a 7-digit number. Who am I?

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You are

1575699

Explanation:

First, run-length decode the string (the first digit in each character pair is the number of repetitions, the second one is the character to be repeated, e.g. 233d -> 33ddd). Then some hexadecimal numbers are obtained. Convert them to binary and get the following:
10011101111011101110111011100
10010000001010001000101010100
10010000001010001000101010100
10010000001010001000101010100
10010000001010001000101010100
10011100010011101110111011100
10000100100000101010001000100
10000100100000101010001000100
10000100100000101010001000100
10000100100000101010001000100
10000100100000101010001000100
10011100100011101110111011100

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  • $\begingroup$ Nice! I was afraid it wasn't a well-formed puzzle. Thanks for playing along! =) $\endgroup$ – coredump May 29 at 11:48

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