What would be a message to send to extraterrestrials?

[PB666]

6 minutes ago, HebaruSan said:

FYI, this "pi=10" thing has been brought up already in at least one other thread. When problems with the idea were pointed out, no solutions were forthcoming. I'd recommend trying to stay focused on the original thread topic rather than rehashing irrational bases.

 

Taking lots on how many more posts until this thread is closed.

my lot is pi. :^).

[p1t1o]

1 hour ago, Darnok said:

. .. ... .... ..... ...... etc.

Given you are transmitting in binary there, I don't know why you wouldn't just use binary to encode your data, instead of shoehorning in base-10.

And I still don't now what you have against primes. Compared to counting up a number ladder, a list pf primes should jump off the screen like one of those "scare" GIFs.

[Darnok]

3 minutes ago, p1t1o said:

Given you are transmitting in binary there, I don't know why you wouldn't just use binary to encode your data, instead of shoehorning in base-10.

And I still don't now what you have against primes. Compared to counting up a number ladder, a list pf primes should jump off the screen like one of those "scare" GIFs.

Why would you use binary? https://en.wikipedia.org/wiki/Unary_numeral_system

[p1t1o]

4 minutes ago, Darnok said:

Why would you use binary? https://en.wikipedia.org/wiki/Unary_numeral_system

Bored.

 

[kerbiloid]

17 hours ago, Aethon said:

Send the entire internet.  Google servers, Wikipedia.

And receive an answer: "Greetings, our dear galactic brazzers!"

 

About Arecibo message and same stuff: imho, there should be not N x M rectangle (where N and M are prime numbers), but a sequence of square frames with Zener cards

  .

(Not rectangles as here, but squares, say, 17 x 17. Or, say, 59 x 59).

Rather than a product of prime integers, N² would be recognized by everybody. This everybody would draw a table 17 x 17 and recognize some regular geometric figures, exactly artificial.
Receiving a repeating series of squares they can build a sequence of simple absolutely unnatural images, and then will listen for more complicated ones.
 

Solar System scheme is useless: not too many habitable planets around the Sun. Anyway, they would identify us by our star, not planet.
Ugly human-like monster is useless, because they would have no idea what's this thing.
Atoms are useless, because if Terrans can send a message, it's absolutely clear that they know about chemistry.
McDonald's emblem at the very bottom of the message is not very recognizable, too - also they actually miss the Nike's one.

[martincmartin]

I made this and posted it to the internet 25 years ago, people had fun with it:

Suppose the following message was received by a radio telescope. It consists ofa number of bursts that last either one, two or three tenths of a second, indicated by S, M and L (respectively) below. The space between two bursts is either one or two tenth of a second, the longer pause marked by an X below. There are 1442 Ss, 1249 Ms, 853Ls, and 142 Xs, total time is 1018.4 sec. Can you figure out what it means?

MMMMMMMMMMMMMMMMMMMMMMMMXMMMMMMMMMMSMMMMMMMMMMMMMXMMMMMMMMMMSSMMMMMMMM
MMMMXMMMMMMMMMMSSSMMMMMMMMMMMXMMMMMMMMMMSSSSMMMMMMMMMMXMMMMMMMMMMSSSSS
MMMMMMMMMXMMMMMMMMMMSSSSSSMMMMMMMMXMMMMMMMMMMSSSSSSSMMMMMMMXMMMMMMMMMM
SSSSSSSSMMMMMMXMMMMMMMMMMSSSSSSSSSMMMMMXMMMMMMMMMMSSSSSSSSSSMMMMXMMMMM
MMMMMSSSSSSSSSSSMMMXMMMMMMMMMMSSSSSSSSSSSSMMXMMMMMSMMMMMMMMMMMMMMMMMMX
MMMMMLMMMMSMMMMMMMMMMMMMXMMMMLSMMMMSSMMMMMMMMMMMMXMMMMLLMMMMSSSMMMMMMM
MMMMXMMMLSSMMMMSSSSMMMMMMMMMMXMMMLSLMMMMSSSSSMMMMMMMMMXMMMLLSMMMMSSSSS
SMMMMMMMMXMMMLLLMMMMSSSSSSSMMMMMMMXMMLSSSMMMMSSSSSSSSMMMMMMXMMLSSLMMMM
SSSSSSSSSMMMMMXMMLSLSMMMMSSSSSSSSSSMMMMXMMLSLLMMMMSSSSSSSSSSSMMMXMMLLS
SMMMMSSSSSSSSSSSSMMXSSSMMMMXSSLMMMMSXSSLSMMMMSSXSSLLMMMMSSSXSSLSSMMMMS
SSSXSSLSLMMMMSSSSSXSSLLSMMMMSSSSSSXSSLLLMMMMSSSSSSSXSSLSSSMMMMSSSSSSSS
XSSLSSLMMMMSSSSSSSSSXSSLSLSMMMMSSSSSSSSSSXSSLSLLMMMMSSSSSSSSSSSXSSLLSS
MMMMSSSSSSSSSSSSXLLSSMSSLMSSLMMMMSSLXLLSSMSSSMSSLMMMMSSLXLLSSMSSLMSSSM
MMMSSLXLLSSMSSSMSSSMMMMSSSXLLSLMSSLMSSLMMMMSSLXLLSLMSSSMSSLMMMMSSSXLLS
LMSSLMSSSMMMMSSSXLLSLMSSSMSSSMMMMSSSXLLSMSSSMMMMSSLXLLSMSSLMMMMSSSXSSS
MLSMSLSXLLSSMSLSMSSLMMMMSSLXLLSSMSLSMSSSMMMMSSSXLLSLMSLSMSSLMMMMSSSXLL
SLMSLSMSSSMMMMSSSXLLSMSLSMMMMSSLXSLSMMMMSSSXSSLMLSMSLSXLLSSMSLSMSSLMMM
MSSLXLLSSMSLSMSSSMMMMSSLXLLSLMSLSMSSLMMMMSSLXLLSLMSLSMSSSMMMMSSSXLLSMS
LSMMMMSSSXSLSMMMMSSLXLLSSMSSLMSSLMLSMSLSMMMMSSLMLSMSLSXLLSSMSSLMSSLMLS
MSLSXSLSMMMMSSLXLLSSSMSSLMSSLMMMMSSSXLLSSSMSSSMSSLMMMMSSSXLLSSSMSSLMSS
SMMMMSSSXLLSSSMSSSMSSSMMMMSSLXLLSSMSLSMSLLMLSMSLLSXLLSMSLLSMLSMSLLLXSS
SMLSMSLSXSSSMLSMSLLXSLLSMMMMSSSXSLLLMMMMSSLXSSLMLSMSLSXSLLSMMMMSSSXSLL
LMMMMSSLXSSSMLSMSLSXSSLMLSMSLLXSLLSMMMMSSSXSLLLMMMMSSLXSSLMLSMSLSXSLLS
MMMMSSLXSLLLMMMMSSSXMLSMSLSXMLSMSLLXLLSSSMSLSMSLLMMMMSLLLXLLSSMSLSMSLL
MLSMSLLSMMLLSMSLSMLSMSLLLMMMMLLSSSMSLSMSLLMMMSLLLXLLSLMSLSMSLLMLSMSLLS
MMLLSMSLSMLSMSLLLMMMMLLSLSMSLSMSLLMMMSLLLXLLSLSMSSLMSSLMMMMSSSXLLSLSMS
SLMSSSMMMMSSSXLLSLSMSSSMSSLMMMMSSSXLLSLSMSSSMSSSMMMMSSLXLLSSMSLSMSLLML
SMSLLSMMLLSLSMSLSMSLLMLSMSLLLMMLLSLMSLLSMSLLLMLSMSLLSSMMMMLLSSLMSLSMSL
LMMMSLLSSXLLSMSLSMLSMSLLSMMLLSMSLLMLSMSLLLMMLLSLMSLSMSLLLMLSMSLLSSMMLL
SLMSLLMSLLSMLSMSLLSLMMLLSSMSLLSSMSLLSLMLSMSLLLSMMMMLLSSLMSLSMSLLMMMSLL
LSXLLSSLMSLSMSLLMLSMSLLSMMLLSLMSLSMSLLMSLLLMMMMLLLSMSLSMSLLMMMSLLSMSLL
LXLLLSMSSLMSSLMMMMSSSMSSLXLLLSMSSSMSSLMMMMSSLMSSSXLLLSMSSLMSSSMMMMSSLM
SSSXLLLSMSSSMSSSMMMMSSSMSSSXLLLSMSLSMSLLMLSMSLLLMSLLSSMMLLLSMSLLSMSLLL
MLSMSLLSLMSLLLSMMLLSSMSLLSSMSLLLSMLSMSLLLLMMMMLLLLMSLSMSLLMSLLSMMMSLLS
LMSLLLLXLLLLMSLLSMSLLSLMSLLLSMLSMSLLSSLMSLLSLLMMLLLLMSLLMSLLSSMSLLSLLM
LSMSLLSSSMSLLLSSMMLLLLMSLSMSLLLMSLLLSSMLSMSLLLLMSLLSLSMMMMLLLLMSLSMSLL
MSLLSMSLLLMSLLSSMSLLSLMSLLLSMMMSLLLLMSLLSSSMSLLSSLMSLLSLSXLLLLMSSSMSSL
MSSSMSSLMSSLMSSSMSSLMMMMSSSMSSSMSSLMSSLXLLLLMSSLMSSSMSSLMSSSMSSSMSSSMS
SLMSSSMSSSMMMMSSLMSSLMSSSMSSSMSSSXLLSSSMSLSMSLLLMLSMSLLSMMLLSSSMSLLSMS
LLMLSMSLLLMMMMLLLMSLSMSLLMMMSLLSMSLLLXSSLMLSMSLLLXLLLMSSSMSSSMMMMSSSMS
SLXLLLMSSSMSSLMMMMSSLMSSSXLLLMSSSMSSSMMMMSSLMSSSXLLLMSSLMSSSMMMMSSSMSS
LXLLLMSSSMSSSMMMMSSSMSSLXMMMMMMMMMMMMXSSSMLSSMSSLSLMMMMSSLSLXSSSMLSSMS
SLSLLSMMMMSSLSLLSXSSLSLLMLSSMSSLMMMMSSLLSSXSSLSSLMLSSMSSLMMMMSSLSLSXSS
LLSLSMLSSMSSLMMMMSSLLSLLXSSLMLSSMSSLSLMMMMSSLLSXSSLSMLSSMSSLLMMMMSSLSL
XSSLSMLSSMSSLSLMMMMSSLLLXSSLSMLSSMSSLSLSMMMMSSLLSSXSSLLSMLSSMSSLSLSMMM
MSSLSSSSXSSLSLLMLSSMSSLSSLMMMMSSLSLSSXSSLSSLSMLSSMSSLSLSMMMMSSLLLSSXSS
SMLSSMSLSMMMMSLSXSLSMLSSMSLLMMMMSLLMLSSMSLSXSLSMLSLMSLLMMMSLLSMMMMSLLM
LSSMSLLSMMMSLSXMSSLLSSMLSLMSSLSLSMMMMSSLSXSSLSLSSMLSLMSSLSSLMMMMSSLSLL
XSSLSSMLSLMSSLLMMMMSSLXSSLSMLSLMSSLMMMMSSLXSSLMLSLMSSLMMMMSSSXSSSMLSLM
SSLMMMMSSSLXSSSLMLSLMSSLMMMMSSSLSXSSSMLSLMSSLSMMMMSSSLSXSSSLSMLSLMSSLM
MMMSSSLLXSSSMLSLMSSLLMMMMSSSLLXSSSMLSLMSSLSSMMMMSSSLSSXSSSMLSLMSSLSLMM
MMSSSLSLXSSLLMMSSLSMMSSLMMSSSMMSSSLMMSSSLSMMSSSLLMMSSSLSSMMSSSLSLMMSSS
LLSMMSSSLLLMMSSSLSSSXSSLSLLMLSSMSSSLSLLMMMMSSS

http://martincmartin.com/seti-puzzle/

 

[Elrond Cupboard]

1 hour ago, martincmartin said:

I made this and posted it to the internet 25 years ago, people had fun with it:

Suppose the following message was received by a radio telescope. It consists ofa number of bursts that last either one, two or three tenths of a second, indicated by S, M and L (respectively) below. The space between two bursts is either one or two tenth of a second, the longer pause marked by an X below. There are 1442 Ss, 1249 Ms, 853Ls, and 142 Xs, total time is 1018.4 sec. Can you figure out what it means?

MMMMMMMMMMMMMMMMMMMMMMMMXMMMMMMMMMMSMMMMMMMMMMMMMXMMMMMMMMMMSSMMMMMMMM
MMMMXMMMMMMMMMMSSSMMMMMMMMMMMXMMMMMMMMMMSSSSMMMMMMMMMMXMMMMMMMMMMSSSSS
MMMMMMMMMXMMMMMMMMMMSSSSSSMMMMMMMMXMMMMMMMMMMSSSSSSSMMMMMMMXMMMMMMMMMM
SSSSSSSSMMMMMMXMMMMMMMMMMSSSSSSSSSMMMMMXMMMMMMMMMMSSSSSSSSSSMMMMXMMMMM
MMMMMSSSSSSSSSSSMMMXMMMMMMMMMMSSSSSSSSSSSSMMXMMMMMSMMMMMMMMMMMMMMMMMMX
MMMMMLMMMMSMMMMMMMMMMMMMXMMMMLSMMMMSSMMMMMMMMMMMMXMMMMLLMMMMSSSMMMMMMM
MMMMXMMMLSSMMMMSSSSMMMMMMMMMMXMMMLSLMMMMSSSSSMMMMMMMMMXMMMLLSMMMMSSSSS
SMMMMMMMMXMMMLLLMMMMSSSSSSSMMMMMMMXMMLSSSMMMMSSSSSSSSMMMMMMXMMLSSLMMMM
SSSSSSSSSMMMMMXMMLSLSMMMMSSSSSSSSSSMMMMXMMLSLLMMMMSSSSSSSSSSSMMMXMMLLS
SMMMMSSSSSSSSSSSSMMXSSSMMMMXSSLMMMMSXSSLSMMMMSSXSSLLMMMMSSSXSSLSSMMMMS
SSSXSSLSLMMMMSSSSSXSSLLSMMMMSSSSSSXSSLLLMMMMSSSSSSSXSSLSSSMMMMSSSSSSSS
XSSLSSLMMMMSSSSSSSSSXSSLSLSMMMMSSSSSSSSSSXSSLSLLMMMMSSSSSSSSSSSXSSLLSS
MMMMSSSSSSSSSSSSXLLSSMSSLMSSLMMMMSSLXLLSSMSSSMSSLMMMMSSLXLLSSMSSLMSSSM
MMMSSLXLLSSMSSSMSSSMMMMSSSXLLSLMSSLMSSLMMMMSSLXLLSLMSSSMSSLMMMMSSSXLLS
LMSSLMSSSMMMMSSSXLLSLMSSSMSSSMMMMSSSXLLSMSSSMMMMSSLXLLSMSSLMMMMSSSXSSS
MLSMSLSXLLSSMSLSMSSLMMMMSSLXLLSSMSLSMSSSMMMMSSSXLLSLMSLSMSSLMMMMSSSXLL
SLMSLSMSSSMMMMSSSXLLSMSLSMMMMSSLXSLSMMMMSSSXSSLMLSMSLSXLLSSMSLSMSSLMMM
MSSLXLLSSMSLSMSSSMMMMSSLXLLSLMSLSMSSLMMMMSSLXLLSLMSLSMSSSMMMMSSSXLLSMS
LSMMMMSSSXSLSMMMMSSLXLLSSMSSLMSSLMLSMSLSMMMMSSLMLSMSLSXLLSSMSSLMSSLMLS
MSLSXSLSMMMMSSLXLLSSSMSSLMSSLMMMMSSSXLLSSSMSSSMSSLMMMMSSSXLLSSSMSSLMSS
SMMMMSSSXLLSSSMSSSMSSSMMMMSSLXLLSSMSLSMSLLMLSMSLLSXLLSMSLLSMLSMSLLLXSS
SMLSMSLSXSSSMLSMSLLXSLLSMMMMSSSXSLLLMMMMSSLXSSLMLSMSLSXSLLSMMMMSSSXSLL
LMMMMSSLXSSSMLSMSLSXSSLMLSMSLLXSLLSMMMMSSSXSLLLMMMMSSLXSSLMLSMSLSXSLLS
MMMMSSLXSLLLMMMMSSSXMLSMSLSXMLSMSLLXLLSSSMSLSMSLLMMMMSLLLXLLSSMSLSMSLL
MLSMSLLSMMLLSMSLSMLSMSLLLMMMMLLSSSMSLSMSLLMMMSLLLXLLSLMSLSMSLLMLSMSLLS
MMLLSMSLSMLSMSLLLMMMMLLSLSMSLSMSLLMMMSLLLXLLSLSMSSLMSSLMMMMSSSXLLSLSMS
SLMSSSMMMMSSSXLLSLSMSSSMSSLMMMMSSSXLLSLSMSSSMSSSMMMMSSLXLLSSMSLSMSLLML
SMSLLSMMLLSLSMSLSMSLLMLSMSLLLMMLLSLMSLLSMSLLLMLSMSLLSSMMMMLLSSLMSLSMSL
LMMMSLLSSXLLSMSLSMLSMSLLSMMLLSMSLLMLSMSLLLMMLLSLMSLSMSLLLMLSMSLLSSMMLL
SLMSLLMSLLSMLSMSLLSLMMLLSSMSLLSSMSLLSLMLSMSLLLSMMMMLLSSLMSLSMSLLMMMSLL
LSXLLSSLMSLSMSLLMLSMSLLSMMLLSLMSLSMSLLMSLLLMMMMLLLSMSLSMSLLMMMSLLSMSLL
LXLLLSMSSLMSSLMMMMSSSMSSLXLLLSMSSSMSSLMMMMSSLMSSSXLLLSMSSLMSSSMMMMSSLM
SSSXLLLSMSSSMSSSMMMMSSSMSSSXLLLSMSLSMSLLMLSMSLLLMSLLSSMMLLLSMSLLSMSLLL
MLSMSLLSLMSLLLSMMLLSSMSLLSSMSLLLSMLSMSLLLLMMMMLLLLMSLSMSLLMSLLSMMMSLLS
LMSLLLLXLLLLMSLLSMSLLSLMSLLLSMLSMSLLSSLMSLLSLLMMLLLLMSLLMSLLSSMSLLSLLM
LSMSLLSSSMSLLLSSMMLLLLMSLSMSLLLMSLLLSSMLSMSLLLLMSLLSLSMMMMLLLLMSLSMSLL
MSLLSMSLLLMSLLSSMSLLSLMSLLLSMMMSLLLLMSLLSSSMSLLSSLMSLLSLSXLLLLMSSSMSSL
MSSSMSSLMSSLMSSSMSSLMMMMSSSMSSSMSSLMSSLXLLLLMSSLMSSSMSSLMSSSMSSSMSSSMS
SLMSSSMSSSMMMMSSLMSSLMSSSMSSSMSSSXLLSSSMSLSMSLLLMLSMSLLSMMLLSSSMSLLSMS
LLMLSMSLLLMMMMLLLMSLSMSLLMMMSLLSMSLLLXSSLMLSMSLLLXLLLMSSSMSSSMMMMSSSMS
SLXLLLMSSSMSSLMMMMSSLMSSSXLLLMSSSMSSSMMMMSSLMSSSXLLLMSSLMSSSMMMMSSSMSS
LXLLLMSSSMSSSMMMMSSSMSSLXMMMMMMMMMMMMXSSSMLSSMSSLSLMMMMSSLSLXSSSMLSSMS
SLSLLSMMMMSSLSLLSXSSLSLLMLSSMSSLMMMMSSLLSSXSSLSSLMLSSMSSLMMMMSSLSLSXSS
LLSLSMLSSMSSLMMMMSSLLSLLXSSLMLSSMSSLSLMMMMSSLLSXSSLSMLSSMSSLLMMMMSSLSL
XSSLSMLSSMSSLSLMMMMSSLLLXSSLSMLSSMSSLSLSMMMMSSLLSSXSSLLSMLSSMSSLSLSMMM
MSSLSSSSXSSLSLLMLSSMSSLSSLMMMMSSLSLSSXSSLSSLSMLSSMSSLSLSMMMMSSLLLSSXSS
SMLSSMSLSMMMMSLSXSLSMLSSMSLLMMMMSLLMLSSMSLSXSLSMLSLMSLLMMMSLLSMMMMSLLM
LSSMSLLSMMMSLSXMSSLLSSMLSLMSSLSLSMMMMSSLSXSSLSLSSMLSLMSSLSSLMMMMSSLSLL
XSSLSSMLSLMSSLLMMMMSSLXSSLSMLSLMSSLMMMMSSLXSSLMLSLMSSLMMMMSSSXSSSMLSLM
SSLMMMMSSSLXSSSLMLSLMSSLMMMMSSSLSXSSSMLSLMSSLSMMMMSSSLSXSSSLSMLSLMSSLM
MMMSSSLLXSSSMLSLMSSLLMMMMSSSLLXSSSMLSLMSSLSSMMMMSSSLSSXSSSMLSLMSSLSLMM
MMSSSLSLXSSLLMMSSLSMMSSLMMSSSMMSSSLMMSSSLSMMSSSLLMMSSSLSSMMSSSLSLMMSSS
LLSMMSSSLLLMMSSSLSSSXSSLSLLMLSSMSSSLSLLMMMMSSS

http://martincmartin.com/seti-puzzle/

 

It's a lolcat, isn't it? Be honest now...

[Findthepin1]

Nope, the answer is 0. 11-11=0.