The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Spelling Numbers 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 dcgjb 782 316 714ms 22 Feb 2024 322nd jared-hughes 782 444 447ms 17 Jul 2022 323rd Shanethegamer 🇺🇸 781 277 4ms 5 Nov 2022 324th MeWhenI 🇻🇦 781 334 179ms 25 Oct 2024 325th SirBogman 🇺🇸 781 509 50ms 3 Jun 2025 326th ovs-code 🇩🇪 780 311 600ms 10 Mar 2024 327th dokutan 780 1,723 13ms 23 Feb 2026 328th sean-niemann 🇺🇸 779 384 607ms 4 Nov 2023 329th Shanethegamer 🇺🇸 779 387 194ms 24 May 2025 330th Shanethegamer 🇺🇸 779 458 301ms 26 Oct 2022 331st CatsAreFluffy 778 346 13ms 14 Dec 2022 332nd frosster 🇨🇦 778 435 4ms 7 Feb 2026 333rd MeWhenI 🇻🇦 777 385 574ms 4 Mar 2022 334th MeWhenI 🇻🇦 777 406 411ms 27 Jul 2024 335th hallvabo 🇳🇴 776 245 15ms 5 Jan 2022 336th CatsAreFluffy 776 297 57ms 11 Mar 2023 337th edsrzf 🇳🇿 774 354 12ms 10 May 2025 338th KatieLG 🇬🇧 773 348 12ms 8 Mar 2024 339th typeswitch-dev 🇵🇹 773 446 48ms 26 Jul 2023 340th cjdyer 773 449 544ms 11 days ago 340th hazzery 773 449 542ms 11 days ago 342nd msbranicky 772 409 2,712ms 8 Jan 2025 343rd JOrE20 771 349 15ms 25 Dec 2025 344th janbehrens 🇩🇪 771 355 12ms 2 Jul 2023 345th Shanethegamer 🇺🇸 770 440 44ms 6 Sep 2022 346th MeWhenI 🇻🇦 769 247 36ms 15 Apr 2025 347th prplz 🇦🇺 769 350 13ms 13 Oct 2020 348th stefangimmillaro 768 518 51ms 26 Apr 2023 349th pardouin 🇫🇷 767 315 1,384ms 15 Aug 2025 350th Yewzir 🇧🇪 767 590 1,794ms 26 May 2024 351st Yax42 🇫🇷 766 385 438ms 6 hours ago 352nd ovs-code 🇩🇪 764 331 20ms 5 Oct 2024 353rd Lv0Sys 🇵🇱 764 352 16ms 20 Feb 2026 354th Shanethegamer 🇺🇸 762 318 765ms 14 Dec 2021 355th stefangabos 🇷🇴 762 353 11ms 16 Sep 2022 356th Shanethegamer 🇺🇸 762 389 233ms 20 Dec 2021 357th bendiscz 762 479 296ms 20 Apr 2020 358th Shanethegamer 🇺🇸 761 525 64ms 6 Jul 2022 359th Program-Pi 760 354 14ms 6 days ago 360th lynn 760 397 202ms 20 May 2021 361st MeWhenI 🇻🇦 759 285 4ms 12 Nov 2022 362nd anter69 🇭🇺 759 315 41ms 7 Jan 2021 362nd Natanaelel 🇸🇪 759 315 207ms 16 Feb 2024 364th MeWhenI 🇻🇦 759 454 7ms 30 Oct 2023 365th GrayJoKing 🇦🇺 759 474 44ms 27 Jan 2023 366th SirBogman 🇺🇸 758 164 540ms 5 Oct 2020 367th CaedenHarper 🇨🇦 758 482 285ms 20 Nov 2025 368th Bulmenisaurus 757 251 22ms 8 Aug 2024 369th jared-hughes 756 316 38ms 12 Sep 2022 370th daisy-lau 754 357 12ms 10 Jun 2020 371st KatieLG 🇬🇧 752 318 40ms 29 Aug 2024 372nd FlyingPenguin223 752 450 4ms 16 Oct 2024 373rd detrumi 🇳🇱 752 474 241ms 5 Jan 2020 374th primo-ppcg 🇹🇭 750 236 9ms 6 Jul 2021 375th MeWhenI 🇻🇦 750 366 111ms 16 Oct 2022 376th olleicua 🇺🇸 749 319 38ms 21 Jan 2024 377th SirBogman 🇺🇸 749 330 742ms 14 Jun 2024 378th AlephSquirrel 748 254 15ms 22 Jan 2024 379th plcc0 748 264 72ms 3 Nov 2025 380th lynn 747 275 36ms 19 Apr 2021 381st janlelis 745 255 31ms 26 Aug 2025 382nd hyvyys 745 361 11ms 19 Sep 2020 383rd JDiLenarda 🇫🇷 745 435 1,382ms 4 Dec 2023 384th o0lit3 🇺🇸 744 238 112ms 12 Apr 2021 385th nwellnhof 🇩🇪 744 256 375ms 27 Feb 2023 386th DialFrost 🇸🇬 744 396 119ms 26 Nov 2025 387th KasperKivimaeki 🇫🇮 742 492 297ms 4 Oct 2025 388th msbranicky 741 493 308ms 31 Aug 2023 389th SirBogman 🇺🇸 741 727 23ms 23 Nov 2022 390th msbranicky 739 383 4ms 11 Oct 2023 391st MeWhenI 🇻🇦 739 729 62ms 19 Jul 2025 392nd Salutations45 736 294 4ms 19 Dec 2024 393rd emgordon154 735 355 171ms 14 Nov 2024 394th Lv0Sys 🇵🇱 733 408 469ms 28 Nov 2025 395th alemelis 732 331 739ms 23 Jul 2024 396th xnor-gate 732 405 235ms 21 Jan 2022 397th janbehrens 🇩🇪 732 449 2ms 21 Mar 2022 398th Yewzir 🇧🇪 731 475 1,876ms 27 Jan 2024 399th anter69 🇭🇺 730 331 1,251ms 13 Mar 2025 400th CaedenHarper 🇨🇦 730 404 388ms 16 Oct 2025 First Prev 321–400 of 1,085 Next Last