# 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:

3317111137

1459747597

0220720026

2718777171

1721783005

0410786683

0219738502

2751728896

2718520890

6250078234

0481674030

8331075893

4258278284

8478774884

8051128195

7575575233

7730779032

1900878019

2736954374

8488876540

3005052750

6364279574

5085352380

5444556454

0325506542

5595779755

3437434374

9404668858

2918998662

2159303284

9189386871

8129998191

9185511569

4418334313

2988682889

3854343485

5711384172

6800282142

5274153135

5807657046

4554557145

8111182116

4223224332

5376563052

8778680674

1559078097

4715406122

2059009032

7691343505

4085998850

1713433413

2959395393

7511997115

8699081996

4934109740

9956306872

7534920510

7564345534

3501933505

9764344443

4034340000

6956226656

7292479425

5867080587

5638855368

4156615642

6644114476

1389811469

6992554638

9003181470

5920810349

3113210388

6564766756

2773737877

5241414441

2008990000

2003944441

2983701033

2388604956

2569757284

6044995272

3225782633

3485788730

3219902286

6268923055

0445155144

3266962963

6288728128

3785758375

1629792797

6875262860

8419791889

4177311437

7580115075

4430706047

6480358971

7437745743

6539175061

6910674761

9073575597

5119899111

4729244222

5848335753

5729347647

4769885953

9028460160

5849852409

9099335776

3709821524

2797671521

3539259463

1999070464

1896151968

9294229984

7571771581

9229772967

8038680426

8017606218

6711717376

3037700357

6766336376

2016617377

9088706376

5182231317

4738710377

9449654276

## The puzzle

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

9930428724

2810028252

0572614211

9527274744

7714717714

1414114442

8734478834

2419126241

5477572524

8432343463

8595943731

1107700931

0991613739

4493793743

9909609969

2243442132

3334403734

5052510351

9500009800

8483323840

5516116055

9369396183

7628259053

4982423103

8294656150

5231823283

9978813023

3004533177

3994198446

7688698708

2990329044

7600171012

2084688408

3793999997

0901550950

7058308050

9684486694

8488333384

9710916099

7519717755

1048788342

1643929479

7013960245

9413563644

9910768636

6535773567

1013211213

6891880886

9887798898

6181722429

6593808647

9485894564

9593712549

6887760301

8147831113

7313349008

5504139578

0530255071

1508151068

4354443573

1616929106

5552851598

3310035011

7000160710

3223513225

3111133611

5551959830

8902019210

3141359610

6349863210

8231669615

8140836711

3566860011

3703760519

9795760799

5354859749

4795759746

0602160210

0065861809

9616064091

4404420044

5486008563

4221022024

5762255672

0421310311

0416549443

5423038133

5464390071

5782527897

5721295879

3025010921

3703612027

9468935424

4862236621

3022332028

8804487453

1202280021

3339936991

1122515624

9321590455

7668819405

5851600484

7198613368

8888119861

5543530354

4050505405

6696926960

8049493448

1493636939

5467166115

5681000880

1903139129

5681985195

6604055209

1489193547

6403926674

1901957200

0864999084

6512416110

0042746033

6648786108

1647376743

7712977773

6564776667

6418488441

0043903404

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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