# Puzzle - First to solve wins

For years I've had an idea in my head about a way to hide some information in a bunch of numbers. I actually got around to coding an implementation and figured I'd run a competition. The first person who figures out what the famous landmark is described by the second set of numbers below and posts the correct answer in the comments wins $100.

## The hint

Here's a hint. The following numbers are a reference to the Eiffel tower:

1577790159

5601046645

0254578683

1545696889

5695598655

5146474611

8990870889

0091090191

2426646244

1713214809

3599142049

4692833570

1558434040

0393333040

4004937049

7271312372

5999444598

0086686809

2729772722

9785788178

6054006550

8673573666

9879768547

9653087380

9055011333

8762082843

8782320160

2829234582

9191818912

9698698326

9330990503

4691098326

1449698383

4759990921

0862494522

6085816383

5473174477

3797444773

8828686888

8268778270

8968727945

7897555571

8727459124

3427597160

5793699307

9546226229

6135131161

2409194944

9770377993

9285382241

6179156751

1476330328

2700226801

9131111709

3584724393

5069120444

5970244380

1611694320

1228112623

9733537593

8990090480

3432324344

5550454140

7683500054

6676693335

3687990034

6687946851

3577535355

8637038376

4768046977

6036993960

7687678867

9028277829

3747074928

0474888212

8094096222

8127996728

2892283229

9890868909

0102004812

7525275252

4171075100

4405144014

8236422863

4459554459

4451182775

8503512103

8431025749

4471105026

1235470472

0680589085

9244222941

2320332204

1101350361

7028652381

4195588385

6755182990

6915059065

4603089941

8747751345

8749186095

8741588695

7760722789

7399559773

1041611040

8760700786

1717311171

8748188084

9568965895

2444444127

8411178921

9096757096

8120073026

8996874917

7303434199

9427277825

5511753027

3589665532

2962061134

5363292114

2379495134

9993999139

2133662113

5545365534

2155592519

1993191619

## The puzzle

Given the above hint, what famous landmark do the numbers below refer to?

5866133356

9825528540

4264182133

3655184004

9866199669

7655156561

5224992992

3706000377

4026646448

0593179120

3574124220

2727071120

4512458926

6444552416

8227889277

2388128138

9795957929

5471074110

7180577539

6718236637

6618290417

7983544425

7273555355

6438224684

5980282809

0618600866

0760770068

9597733411

3537754319

1815750135

1831784425

9291717797

1867776788

8574044473

3235833538

0637136166

9959499349

5186211628

7544175444

6244999499

7934162855

6286171911

6229829895

5534955280

5546231735

4484084104

9244352943

9333939964

2888118082

2488839904

0172954073

0147178387

1044319072

3487258972

2138248269

3061221057

2218764650

2251724261

2168716882

3851253551

6860200080

5411334103

2236826222

8293445910

4572245460

7853627020

5509417229

1291110920

7741447114

0561216260

2492525429

5363593065

4129325149

9873113181

4994099994

3835953339

4824187055

9885039049

4895363096

6973748965

9197163624

9020050294

7681796847

3432824983

8335335840

7555634947

2351096287

7795190933

3261253034

3947151280

3284216129

8609784159

2016194856

3558474108

6909771609

2462296225

6848584156

1858185158

1109316309

0827759978

2070873431

7049183098

0050505330

7896599795

2729479274

2077777778

0950899058

2477147212

9882262938

5575157115

6866636306

7797979971

0793252978

6514377935

8097377835

0218036916

4170976975

6661733922

6388865937

9063763348

8409035636

4744774928

2266664622

0378683667

7333373337

3966535946

Post the answer as a comment below. ~~The first person to answer correctly with an acceptable explanation to how the answer was reached (rather than just a guess) wins $100, so make sure to use your correct e-mail address so I can contact you.~~

**Note #1:** People have noted that the numbers change whenever the page is reloaded. That's as expected. This puzzle is *not* an *encryption* as much as it is an *obfuscation*. That the numbers change is not important, as only the pattern in them will lead to the answer, which is of course constant.

**Note #2:** There was a bug in my post for a short while, which made the hint and puzzle basically the resolve to the same answer. This is fixed now. If you saved a copy the numbers before, just grab a fresh set.

## Solved!

The second landmark was discovered by Batuhan Bozkurt, congratulations! The challenge has not yet been met entirely, though so I've decided to set a new challenge with the same method. ~~The same $100 prize applies~~.

Redditor Bearasaurus has solved the final challenge too! For hints, check the followup post.

## Comments

Big Ben

I'm afraid Big Ben is not it. But be sure to include some explanation as to how the answer was reached, so I know it isn't just a random guess.

I "solved" your puzzle, but I assume not in the way you wanted.

After giving it quite some hours, I failed to find any specific pattern (with a reasonable kolmogorov complexity) that would lead me to an answer. But in Reddit, you mentioned that you would be interested in statistical approaches that would lead to an answer (which I assume you are interested for increasing the security of the obfuscation?) so I exploited the fact that your website gives fresh batch of numbers at each reload so I grabbed about 1000 sets (with intervals in between, hopefully not causing trouble to your website, it handled the requests like a champ) and got to cracking.

Now your HTML formatting implies 10x10 blocks of data for each set. So that was a starting point when I first began looking at the problem. The grid is 70 x 20 so that implies 14 secret codes, 7 for each row.

I looked for what was common for each 10x10 block in each of the samples I gathered from your site. I found out that for each 10x10 block some digits occasionally never appears; for example in block 0x 0y, not all digits have to appear but one always appears at least once.

Once I looked at the remaining digits (that are common in all blocks at a particular coordinate), for the "hint", I was faced by these digits:

0485130

0021739

These are the coordinates in the form of degrees-minutes-seconds (dddmmss as you gave away generously in Reddit) of Eiffel Tower.

Once I ran the same process for the puzzle, the result was:

0295845

0310804

Which is the coordinates for the Great Pyramid of Giza.

Maybe this is disappointing, I don't know. If the website hadn't provided fresh batch of numbers, this method would not work. I assume, to strengthen the obfuscation, you could make sure one digit always appears at least once; but as long as the distribution isn't random, I suppose the answer could be extracted.

I've tried many approaches before this; I'm pretty confident that the pattern is not based on neighborhood relationships (as the answer can appear on edges, though wrapping around could be employed but still with it I failed to detect any patterns). I think it doesn't have anything (or much) to do with arithmetic on the digits (like summing / subtracting them). I tried various row/column patterns and couldn't come up with anything.

I also analyzed the 10x10 blocks containing the answer digits only once (so if the answer is 0 for that block, 0 appears only once in that block). But saw no obvious pattern at all. So this beats me in that regard.

If I am eligible for the prize for my answer, I would kindly ask you to donate it to the Doctors Without Borders foundation. If you are uncomfortable about it for some reason, you can choose to donate it somewhere else you see fit.

Thanks for the challenge, and although my curiosity has been partly satisfied, I'm still waiting for the answer that will allow me to solve this using a pen and paper using a single set of numbers.

Batuhan, the answer is indeed correct. The Great Pyramid of Giza is the one I was looking for. The method you used is indeed not the one I was hoping for, as you haven't actually figured out the way the coordinates are encoded into the sets of numbers.

Still, I'm not one to dictate how the problem should be solved. I will make a donation to Doctors Without Borders for $100 in your name and post proof that I have done so.

Since I would very much like for somebody to solve the method, I'm including this static problem for a second attempt, and another $100. Being in a comment, the following set obviously does not change and encodes a third landmark.

2626513077384364666346599932245309032974209496921885110948315551555613

6549028370497764766953274173448611231555969009312435020244378244262894

9308377132331493394457637801172312372974892873367485438142538547446457

5987478672136633636156339295109196283474021313920015080695500005010510

9318473400638833698356337893287640679475088481921818727043921551931599

5758758671181690400516397336912974972974211231362065019596695870416497

1701226107698865022553554534544375771374969996927993180831110067651597

3203310324331357320447629709425333533533932743923435767555759732852649

0008077080336367751344339394399228589625005440340517458583553308156594

7467243472134765226056779555595344734475199118911888022882025906466417

0332300493776667648725560571112261196221231229957486429403779342535143

1366338577707417047142278890548676887286598087756091175002210326130060

5863902088494574497542911473583959753975898054668946115111760583633056

3673921092972792959782223331128568968982838265801286279605628360969080

5301986352763553665223261861393193111359891776463941295493449120391390

0463999640662807648743557375531417213379281451584481179187119326988940

4352555243298062697573961379660934698929891289118894828988929160129317

1871110111741174649945428445570098658283038728302510575750510526949009

3326333663020967498782260828822839081251556075505536114445618120357157

5602990599311067698721073220721651596922796029092045295295550390501233

The challenge now is to find the answer and a step by step description of how to extract the correct digits from it.

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