The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 21 hours. Why not try and solve them ahead of time?
Repeating Decimals in all languages in chars. 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 Chars Time Submitted 161st SirBogman 🇺🇸 803 252 46ms 3 Jun 2025 162nd canissimia 🇦🇶 801 215 3,746ms 15 Aug 2023 163rd tailorspy 801 226 2,860ms 14 Aug 2024 164th snoozingnewt 🇨🇦 800 55 201ms 4 Nov 2025 165th rucin93 🇵🇱 800 198 4ms 8 Dec 2025 166th Shanethegamer 🇺🇸 800 214 774ms 14 Jul 2023 167th Shanethegamer 🇺🇸 800 243 1,393ms 24 Nov 2024 168th 386asm 🇺🇸 797 256 43ms 29 Apr 2023 169th MeWhenI 🇻🇦 794 487 1,719ms 7 Nov 2025 170th MeWhenI 🇻🇦 793 262 163ms 8 Mar 2023 171st MeWhenI 🇻🇦 792 260 1,029ms 12 Apr 2023 172nd SirBogman 🇺🇸 790 106 291ms 27 Jan 2024 173rd typeswitch-dev 🇵🇹 788 299 225ms 30 Aug 2023 174th Shanethegamer 🇺🇸 785 160 60ms 7 Feb 2023 175th canissimia 🇦🇶 782 340 6ms 25 Apr 2025 176th kg583 🇺🇸 781 358 79ms 8 days ago 177th stefangimmillaro 780 71 39ms 3 Feb 2025 178th ovs-code 🇩🇪 778 180 2ms 18 Jul 2024 179th WilliamDeBlieck 778 394 8ms 2 Mar 2026 180th jared-hughes 776 422 13ms 6 Jul 2024 181st Irratix 🇳🇱 772 124 10ms 1 Feb 2023 182nd annaproxy 772 153 20ms 5 Feb 2023 183rd sean-niemann 🇺🇸 771 222 865ms 9 Feb 2026 184th Alex-x90 🇺🇸 771 235 475ms 19 Feb 2023 185th Shanethegamer 🇺🇸 768 101 32ms 1 Feb 2023 186th KasperKivimaeki 🇫🇮 765 183 2ms 9 Nov 2025 187th elgan65536 🇺🇸 765 308 264ms 5 Mar 2024 188th CLOStrophobic 🇮🇹 763 190 10ms 9 Mar 2025 189th MeWhenI 🇻🇦 762 380 59ms 24 Jun 2024 190th JOrE20 760 126 10ms 9 Feb 2026 191st MeWhenI 🇻🇦 760 304 4ms 24 Jul 2023 192nd Bubbler-4 756 125 143ms 1 Feb 2023 193rd duckyluuk 🇳🇱 754 229 19ms 20 Nov 2025 194th mousetail 🇳🇱 754 238 7ms 12 Apr 2024 195th anter69 🇭🇺 752 139 1,323ms 12 Feb 2025 196th nwellnhof 🇩🇪 749 187 1ms 20 Feb 2023 196th Alex-x90 🇺🇸 749 187 11ms 12 Jul 2023 198th MeWhenI 🇻🇦 747 270 290ms 17 Apr 2023 199th FlorianCassayre 🇫🇷 746 59 711ms 15 Sep 2023 200th albanian-laundromat 745 472 1,425ms 23 Oct 2025 201st SirBogman 🇺🇸 744 127 34ms 5 Dec 2023 202nd nwellnhof 🇩🇪 742 129 10ms 16 Jul 2023 203rd Shanethegamer 🇺🇸 740 101 461ms 6 Dec 2024 204th xsot 🇸🇬 740 124 3ms 14 Apr 2024 205th commandz0 🇺🇸 739 105 19ms 22 Aug 2023 205th ndren 739 105 19ms 25 Nov 2025 207th emgordon154 738 75 38ms 14 Nov 2024 208th veehz 737 130 10ms 21 Feb 2023 209th Shanethegamer 🇺🇸 735 236 428ms 6 Feb 2023 210th SirBogman 🇺🇸 735 488 16ms 27 Dec 2023 211th KatieLG 🇬🇧 733 60 944ms 12 Jan 2026 212th JRaspass 🇬🇧 733 275 286ms 5 Feb 2023 213th CaedenHarper 🇨🇦 726 239 433ms 2 days ago 214th andersk 🇺🇸 725 325 230ms 4 Feb 2023 215th emgordon154 725 485 1,485ms 30 May 2025 216th BlankSpruce 724 250 440ms 17 Feb 2023 217th MeWhenI 🇻🇦 718 263 215ms 11 Apr 2023 218th nwellnhof 🇩🇪 716 117 317ms 22 Jul 2023 219th postie77 714 243 409ms 14 Aug 2024 220th inventshah 710 255 444ms 13 Jul 2023 221st lukegustafson 🇺🇸 709 135 10ms 27 Jun 2024 222nd ovs-code 🇩🇪 706 110 31ms 7 Oct 2023 222nd xnor-gate 706 110 36ms 18 Nov 2023 222nd 5cw 🇺🇸 706 110 21ms 25 Dec 2023 222nd bizy-coder 706 110 20ms 3 Sep 2024 222nd anter69 🇭🇺 706 110 32ms 7 Feb 2025 222nd 4atj 706 110 35ms 6 Jun 2025 222nd HPWiz 🇳🇿 706 110 21ms 8 Dec 2025 222nd blaztoma 🇱🇹 706 110 18ms 17 Dec 2025 230th targrik 706 178 9ms 23 Oct 2025 231st Yax42 🇫🇷 705 246 484ms 19 Nov 2025 232nd MeWhenI 🇻🇦 701 246 15ms 7 Jan 2025 233rd snoozingnewt 🇨🇦 700 204 94ms 19 Oct 2025 234th JOrE20 700 414 26ms 7 Feb 2026 235th lifthrasiir 🇰🇷 699 107 467ms 2 Dec 2024 236th the-zammers 699 308 169ms 17 Oct 2023 237th CaedenHarper 🇨🇦 698 63 203ms 11 Sep 2025 238th Shanethegamer 🇺🇸 698 120 576ms 6 Dec 2024 239th scpchicken 🇵🇼 697 289 290ms 3 Feb 2023 240th albanian-laundromat 693 300 188ms 7 Dec 2025 First Prev 161–240 of 564 Next Last