The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Repeating Decimals in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 321st Alex-x90 🇺🇸 594 236 2ms 13 Mar 2023 322nd Shanethegamer 🇺🇸 592 220 2ms 10 Feb 2023 323rd MeWhenI 🇻🇦 592 271 519ms 7 Nov 2025 324th FortuiteMan 🇫🇷 590 78 155ms 10 Oct 2024 325th m-tkach 🇺🇦 587 180 18ms 4 Feb 2023 326th lifthrasiir 🇰🇷 584 172 530ms 2 Dec 2024 327th anter69 🇭🇺 583 106 40ms 12 Feb 2025 328th rzv-me 581 217 5ms 5 Oct 2024 329th ZakkkkAttackkkk 🇵🇭 578 183 30ms 30 Sep 2023 329th lifthrasiir 🇰🇷 578 183 29ms 21 Nov 2024 329th Flekay 🇩🇪 578 183 12ms 24 days ago 329th snoozingnewt 🇨🇦 578 183 12ms 24 days ago 333rd janbehrens 🇩🇪 577 278 440ms 7 Jul 2023 334th Salutations45 576 160 2ms 25 Jan 2025 335th trinityy-7 576 190 11ms 17 Mar 2024 336th janbehrens 🇩🇪 575 185 355ms 22 Jun 2023 337th MeWhenI 🇻🇦 575 415 3ms 26 Aug 2023 338th Program-Pi 573 191 13ms 9 days ago 339th NDR0216 🇹🇼 572 185 10ms 15 Feb 2023 340th snoozingnewt 🇨🇦 571 176 541ms 20 Feb 2026 341st jared-hughes 570 246 2ms 7 Sep 2023 342nd MeWhenI 🇻🇦 569 286 410ms 9 Mar 2023 343rd NickTheEASDude 🇺🇸 568 229 2ms 22 Aug 2024 344th xsot 🇸🇬 565 187 11ms 11 Mar 2023 345th stefangimmillaro 562 359 306ms 27 Oct 2023 346th qpwoeirut 559 189 12ms 4 Oct 2025 347th CaedenHarper 🇨🇦 558 180 472ms 40 hours ago 348th kmathis22 557 288 548ms 8 Dec 2025 349th JDiLenarda 🇫🇷 557 312 422ms 23 Nov 2023 350th MeWhenI 🇻🇦 555 227 10ms 28 May 2023 351st janbehrens 🇩🇪 554 191 11ms 22 Jun 2023 351st madex 🇩🇪 554 191 11ms 33 mins ago 353rd blaztoma 🇱🇹 551 112 38ms 17 Dec 2025 354th CaedenHarper 🇨🇦 551 192 28ms 40 hours ago 355th Matter1024 🇮🇳 550 245 2,937ms 18 Jan 2026 356th stefangimmillaro 549 292 486ms 6 Oct 2025 357th mousetail 🇳🇱 549 430 281ms 12 Apr 2024 358th MeWhenI 🇻🇦 548 168 2ms 9 Mar 2023 359th stefangimmillaro 548 193 11ms 29 May 2023 360th zakariamouhid 547 200 13ms 9 Feb 2023 361st weliveinhell 🇭🇹 546 257 2ms 31 Dec 2023 362nd plcc0 545 194 12ms 13 May 2025 362nd YAJUE114514 545 194 11ms 16 Aug 2025 364th janbehrens 🇩🇪 542 202 10ms 7 Jul 2023 365th GolfingSuccess 🇬🇷 540 186 537ms 20 Jan 2024 366th GolfingSuccess 🇬🇷 540 196 11ms 1 Feb 2023 366th stertooy 🇧🇪 540 196 11ms 18 Jun 2024 366th redweasel 540 196 19ms 24 Jul 2025 366th FortuiteMan 🇫🇷 540 196 10ms 27 Nov 2025 370th IISResetMe 538 195 313ms 27 Nov 2025 371st inventshah 537 197 11ms 1 Feb 2023 371st davecame 537 197 10ms 10 Oct 2023 371st SB-945 537 197 11ms 19 Apr 2024 371st andrewjc2000 537 197 11ms 4 Jul 2025 371st shelerr 537 197 11ms 21 Aug 2025 371st Babafaba 537 197 10ms 25 Oct 2025 371st duckyluuk 🇳🇱 537 197 11ms 20 Nov 2025 378th iczelia 🇩🇪 536 204 11ms 25 Oct 2025 379th ndren 535 188 450ms 4 Jul 2025 380th MeWhenI 🇻🇦 535 262 2ms 21 Apr 2023 381st fkantelberg 534 198 11ms 31 Jul 2023 381st ssbhatt4321 534 198 11ms 14 Oct 2023 381st Sp3000 🇦🇺 534 198 11ms 20 Nov 2023 384th Babafaba 532 189 537ms 25 Oct 2025 385th KatieLG 🇬🇧 531 199 11ms 19 Apr 2025 386th CatsAreFluffy 530 342 74ms 11 Feb 2023 387th Alex-x90 🇺🇸 529 200 11ms 1 Feb 2023 387th ahmetdemirag 🇨🇾 529 200 11ms 15 Dec 2024 387th StefanHabel 🇨🇦 529 200 10ms 21 days ago 390th Noam527 529 265 2ms 4 Apr 2024 391st Looney32768 529 303 459ms 3 Feb 2023 392nd RobertHoeh 527 247 2ms 2 May 2024 393rd DialFrost 🇸🇬 526 201 11ms 8 Dec 2023 393rd happppya 526 201 10ms 11 days ago 393rd zgialor-lab 526 201 11ms 4 days ago 396th MeWhenI 🇻🇦 526 272 101ms 6 May 2023 397th stefangimmillaro 526 396 733ms 9 Nov 2023 398th AlephSquirrel 524 192 518ms 21 Jan 2024 399th AlephSquirrel 523 202 18ms 1 Feb 2023 400th jared-hughes 521 203 10ms 17 Feb 2023 First Prev 321–400 of 567 Next Last