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 801st joshuaxie8 415 579 462ms 9 Jul 2025 802nd c0d3-4-F00d 🇩🇪 415 792 5ms 4 Dec 2021 803rd mcipperly 413 422 331ms 26 Aug 2018 804th JunkIce 412 417 688ms 17 Jan 2025 805th Omega65536 🇩🇪 411 463 15ms 10 Aug 2025 806th buddyw 410 464 22ms 9 Mar 2023 807th vroup 🇩🇰 408 660 11ms 19 Sep 2022 808th mazzegi 408 896 287ms 18 Apr 2020 809th dillon-duncando 407 467 13ms 4 Oct 2022 809th luuumine 🇫🇷 407 467 19ms 7 Nov 2025 811th hellwue 406 468 13ms 2 Sep 2024 812th Apataras 406 591 463ms 12 Aug 2025 813th albanian-laundromat 405 424 546ms 9 Aug 2025 814th robin-scragg 404 471 23ms 29 Sep 2025 815th RaBa21 🇭🇺 403 472 21ms 13 Jul 2025 816th Florian-Mt 402 473 19ms 12 Jul 2024 816th Andrey2001 402 473 13ms 1 Feb 2026 818th andre-lameirinhas 🇵🇹 401 474 13ms 27 Apr 2020 819th KatieLG 🇬🇧 398 432 609ms 15 Jan 2024 820th NanduBC 398 477 21ms 18 Apr 2021 821st trist224 🇫🇷 396 480 14ms 16 Nov 2022 821st yuchuehw 396 480 14ms 1 Jan 2024 823rd Jaydosu 394 483 24ms 26 Oct 2021 824th luftj 393 484 13ms 3 May 2020 824th keelimeguy 🇺🇸 393 484 20ms 8 May 2025 826th myleopard 392 485 14ms 13 Oct 2021 827th backupGitProfile 392 752 428ms 21 Nov 2021 828th jfallon1997 389 488 14ms 5 Jan 2023 828th Chara-0x 389 488 12ms 18 Sep 2025 830th vonKrafft 389 489 14ms 27 Mar 2020 830th sciencedjinn 389 489 13ms 8 Nov 2024 832nd dmoa 388 490 21ms 29 May 2020 832nd nullie 388 490 14ms 16 Jun 2022 832nd QuincyNash 🇺🇸 388 490 14ms 16 Nov 2022 832nd jamesthekee 388 490 14ms 27 Jan 2025 836th frobinsonj 388 693 13ms 6 Dec 2019 837th avila-gabriel 388 918 174ms 17 Oct 2024 838th vhoulbreque 🇫🇷 387 491 15ms 4 Dec 2025 839th r-benson 🇬🇧 386 492 13ms 31 Jan 2023 839th te-chnical 386 492 13ms 5 Jan 2026 841st ToriTheChicken 385 699 11ms 30 Jul 2020 842nd stephanie-flower 384 700 13ms 23 Nov 2025 843rd XaavanDolence 384 772 187ms 7 Sep 2020 844th mrmabs 383 496 15ms 16 Jun 2021 845th E2dgar 383 702 13ms 31 Jan 2022 846th bstrautin 382 647 333ms 26 Jul 2020 847th MeWhenI 🇻🇦 380 1,167 1,461ms 10 Feb 2025 848th muser-logiccpu 🇺🇦 379 502 13ms 16 Aug 2025 849th dokutan 378 677 1,075ms 5 Feb 2025 850th neel11235813 377 456 773ms 15 Jan 2024 851st BobDotCom 377 504 13ms 25 Mar 2022 852nd kaascevich 376 360 232ms 20 Jul 2025 853rd PFischbeck 376 505 14ms 27 Sep 2018 854th jhpaques 🇫🇷 372 511 13ms 28 Jul 2022 855th brochmann 🇸🇪 370 514 21ms 13 Aug 2023 856th elisherer 🇮🇱 370 728 12ms 8 Apr 2019 857th aksyristos 369 515 20ms 11 Jun 2023 858th ionutm82 368 516 14ms 23 May 2019 859th Mikey-Beep 🇬🇧 368 517 21ms 25 Aug 2023 860th rschwa6308 🇺🇸 367 518 13ms 8 Nov 2021 860th roguh 🇬🇹 367 518 15ms 13 Oct 2024 860th Stockoh 🇫🇷 367 518 14ms 17 Nov 2024 863rd ndren 366 470 664ms 21 Jan 2024 864th hoodadam 366 519 19ms 18 Sep 2019 864th michelebastione 🇮🇹 366 519 14ms 14 Jul 2021 864th Bodo171 366 519 13ms 6 Dec 2022 867th britishben 366 520 20ms 2 Dec 2018 868th RandGuy 365 521 21ms 28 Jun 2022 869th TJK-S 364 522 14ms 13 Oct 2025 870th qwjhvbxi 363 523 13ms 5 Mar 2024 871st mrmena 🇦🇺 363 524 14ms 20 Mar 2024 872nd evanrittner 362 525 14ms 11 Mar 2019 873rd dokutan 361 874 395ms 1 Dec 2025 874th dokutan 361 963 15ms 7 Nov 2025 875th vodker1 360 528 21ms 9 Mar 2022 876th menglishca 🇨🇦 358 671 451ms 5 Aug 2021 877th jgbaldwinbrown 357 533 17ms 6 Jul 2021 878th Heathcorp 🇦🇺 356 534 19ms 29 Mar 2022 879th adoxography 355 535 22ms 21 May 2018 879th tomh1012 355 535 15ms 22 days ago First Prev 801–880 of 1,085 Next Last
