The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
𝑒 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 318th JayXon 🇺🇸 931 62 1,393ms 15 Aug 2023 322nd BouquetDeFleurs 931 65 313ms 11 Aug 2024 323rd primo-ppcg 🇹🇭 929 94 17ms 17 Jan 2026 324th JayXon 🇺🇸 929 110 506ms 24 Sep 2025 324th nwellnhof 🇩🇪 929 110 493ms 25 Sep 2025 326th primo-ppcg 🇹🇭 927 41 72ms 18 Sep 2023 327th DialFrost 🇸🇬 927 66 2,227ms 28 Aug 2024 328th GrayJoKing 🇦🇺 925 68 358ms 5 Oct 2023 328th Lydxn 🇨🇦 925 68 355ms 8 Oct 2023 328th edsrzf 🇳🇿 925 68 163ms 17 Nov 2025 331st DialFrost 🇸🇬 924 78 366ms 18 Dec 2025 332nd Lydxn 🇨🇦 924 97 388ms 29 Dec 2021 333rd ovs-code 🇩🇪 924 110 66ms 27 Aug 2024 333rd DialFrost 🇸🇬 924 110 63ms 4 Sep 2024 333rd inventshah 924 110 73ms 1 Apr 2025 336th Lydxn 🇨🇦 923 51 38ms 9 Jan 2022 337th ovs-code 🇩🇪 923 114 145ms 20 Apr 2025 338th GrayJoKing 🇦🇺 922 51 84ms 29 May 2022 338th Steffan153 🇫🇮 922 51 87ms 21 Jun 2024 340th JayXon 🇺🇸 922 137 290ms 5 Apr 2025 341st MeWhenI 🇻🇦 921 41 80ms 8 Oct 2022 341st janlelis 921 41 76ms 4 Dec 2023 341st ovs-code 🇩🇪 921 41 44ms 29 Aug 2024 344th stefangimmillaro 921 60 1,413ms 26 Dec 2024 345th JayXon 🇺🇸 921 84 484ms 12 Mar 2022 345th Lydxn 🇨🇦 921 84 479ms 26 Jul 2022 345th sean-niemann 🇺🇸 921 84 529ms 7 Jun 2024 345th Steffan153 🇫🇮 921 84 472ms 21 Jul 2024 345th ovs-code 🇩🇪 921 84 493ms 21 Jul 2024 350th NewDefectus 🇮🇱 920 25 40ms 18 Dec 2021 350th jared-hughes 920 25 41ms 22 Jan 2023 352nd ovs-code 🇩🇪 919 26 41ms 16 May 2024 353rd andersk 🇺🇸 919 28 39ms 4 Mar 2023 353rd BREMAUCY 🇫🇷 919 28 39ms 25 Oct 2024 353rd snoozingnewt 🇨🇦 919 28 38ms 14 Sep 2025 356th MeWhenI 🇻🇦 919 56 7ms 23 Nov 2025 357th pardouin 🇫🇷 918 67 2,684ms 4 Dec 2024 357th JayXon 🇺🇸 918 67 2,866ms 2 Jan 2025 359th JayXon 🇺🇸 918 91 248ms 6 Apr 2025 360th JayXon 🇺🇸 918 105 148ms 22 Apr 2025 361st canissimia 🇦🇶 918 265 179ms 8 Mar 2024 362nd JayXon 🇺🇸 915 89 115ms 16 Oct 2022 362nd emplv 🇱🇻 915 89 121ms 8 Dec 2022 362nd Lydxn 🇨🇦 915 89 120ms 2 Mar 2023 365th HPWiz 🇳🇿 915 93 2,680ms 7 Mar 2025 366th KasperKivimaeki 🇫🇮 915 111 64ms 18 Nov 2024 367th JayXon 🇺🇸 915 115 165ms 5 Apr 2025 368th DialFrost 🇸🇬 915 138 298ms 5 Sep 2024 369th btnlq 914 42 279ms 1 Jan 2021 369th Lydxn 🇨🇦 914 42 274ms 4 Jan 2022 369th DialFrost 🇸🇬 914 42 270ms 7 Jun 2024 369th Steffan153 🇫🇮 914 42 298ms 10 Aug 2024 369th bitsandbeyond 🇳🇱 914 42 282ms 20 Oct 2025 374th primo-ppcg 🇹🇭 914 58 116ms 30 Dec 2018 374th xnor-gate 914 58 119ms 4 Jun 2021 374th ovs-code 🇩🇪 914 58 123ms 19 Jan 2023 377th edsrzf 🇳🇿 914 61 40ms 30 Dec 2024 377th DialFrost 🇸🇬 914 61 38ms 13 Feb 2025 377th kg583 🇺🇸 914 61 40ms 14 Feb 2025 377th zacjl 914 61 41ms 16 May 2025 381st primo-ppcg 🇹🇭 914 118 154ms 6 Aug 2024 382nd sean-niemann 🇺🇸 913 67 2,251ms 19 Dec 2024 383rd GrayJoKing 🇦🇺 912 31 150ms 27 Jan 2021 384th ovs-code 🇩🇪 912 69 5ms 3 Feb 2023 384th DialFrost 🇸🇬 912 69 10ms 23 Aug 2024 386th btnlq 912 92 42ms 24 Sep 2022 387th DialFrost 🇸🇬 912 109 51ms 23 Oct 2024 388th DialFrost 🇸🇬 912 112 374ms 26 Sep 2025 389th DialFrost 🇸🇬 911 85 508ms 7 Jun 2024 390th sean-niemann 🇺🇸 911 87 76ms 19 Nov 2025 390th Steffan153 🇫🇮 911 87 171ms 11 Feb 2026 392nd tayloia 🇬🇧 910 53 13ms 7 Apr 2025 393rd primo-ppcg 🇹🇭 910 91 4ms 24 Aug 2020 393rd ovs-code 🇩🇪 910 91 206ms 24 Aug 2023 393rd inventshah 910 91 7ms 29 Jan 2024 393rd sisyphus-ppcg 🇦🇺 910 91 6ms 4 Sep 2024 393rd DialFrost 🇸🇬 910 91 5ms 4 Sep 2024 398th FlyingPenguin223 910 96 16ms 22 Jan 2026 399th primo-ppcg 🇹🇭 909 179 1,033ms 4 Oct 2020 400th DialFrost 🇸🇬 908 92 196ms 4 Sep 2024 First Prev 321–400 of 3,471 Next Last