# 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:

4434444444

2988628868

7079808507

4393393433

7079388589

4074474411

0073662759

2483445925

4023803075

0536076864

8275974504

3493485845

1360274203

9749779994

0052005302

5158084580

6606260265

6603806863

1314933075

6027132176

8727474236

0318251180

1111131113

9592659260

6750007085

4224332432

7356573576

9711227619

8078577000

9929191991

2494994449

1019926735

8724112724

2024572935

1071172919

1518589597

7479498447

0777550673

2258285722

5398393895

9535695242

2205858423

1865850347

1293518472

7568653497

0871448404

1731332113

8257656287

6710717017

8570349492

0832133953

9737794674

6717705029

9730676497

7166117968

1113531852

2222102251

0032970390

4233037855

8649512822

6630437522

5822902355

0436470858

4681048684

1400800008

2924774422

1733177113

4933761519

2213106650

4601148967

1900822647

1280871712

5811172196

7052471102

2635175105

0237475676

9956952996

5757555675

1344171845

3373473134

1811381103

2163616723

1315661439

3263432463

9996918269

0153416729

4669261223

3482830727

0502162763

2669160463

1094925722

8317985629

4500620626

0128817128

7919117669

6206220126

5655265652

7757118798

1225511521

9716786084

8590470787

2109998083

7590295727

7889997784

7909298027

6636880683

9174595374

7772475742

2999219926

5357753775

0538000587

5582556428

3759016927

5338630288

8868830976

7123739788

0911800626

5588585880

2862992298

1042000414

4734933734

5048581553

2944760799

5532147433

4733139950

3882115894

## The puzzle

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

0403504230

4510641641

8058488085

5142952912

4592547484

0702524055

0602660867

0443609548

8100635686

5144747159

0005000279

2220033420

7114733417

8525677609

6582810279

3816507479

6837077100

6825133119

0554005854

4512741765

8850535084

7836336787

2182238783

3026135885

1249546709

8097401804

7980766787

7133207603

7572284482

7117545687

1516548948

3133553135

7516229611

0573070575

7613913363

1572992275

5046300812

8116781540

1033154198

1116782143

8611716161

3069806600

5156056550

1433141731

5141111151

7249752210

7297674761

3297748325

7210987343

3247536525

7339779393

7253722273

6210960996

7695447574

4741974144

0403114341

0976446974

4276372062

4236984252

4471438386

2703475425

2413498540

0403953327

5232104006

5942895550

5540291608

0949109877

6542155215

5939656353

4990949994

0730808173

0849209949

0437677144

0519951915

7791419774

2125952152

9194907982

0337739275

9719975758

9537939636

9749544369

3353403634

6979776792

2562622156

7044778340

5571476130

5690276334

1318477142

0967973354

9885222396

9248644966

9566259269

6049847989

3775777757

6048724361

7266739170

9748763373

9748829879

9344370040

4943088903

7670575148

8756879755

8910871104

7837777833

9991595155

7830038900

5575575754

4885881548

1600809698

5504557044

8899989186

9791971196

6259671446

0624339496

1780727196

0825409088

6657487694

6614372164

0914451058

0914284368

4824342219

0114310014

5984248556

4926142661

4637466443

0824484040

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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