The Calendar hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Farey Sequence 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 801st msbranicky 538 149 122ms 1 Jan 2024 802nd msbranicky 536 151 166ms 2 Jan 2024 803rd CatsAreFluffy 536 159 65ms 31 Jan 2024 804th msbranicky 535 117 139ms 2 Jan 2024 805th blaztoma 🇱🇹 534 78 39ms 4 Nov 2025 806th dokutan 534 104 847ms 29 Oct 2024 807th madex 🇩🇪 534 105 11ms 21 May 2024 808th MeWhenI 🇻🇦 532 84 2ms 1 Dec 2023 809th KatieLG 🇬🇧 530 109 57ms 5 Oct 2025 810th janbehrens 🇩🇪 530 138 400ms 17 Apr 2025 811th Yewzir 🇧🇪 529 150 3ms 29 Mar 2024 812th HumanoidCPU 529 153 92ms 16 Nov 2025 813th YAJUE114514 527 138 146ms 23 Jul 2025 814th anarconic 526 125 2ms 11 Dec 2023 815th Yewzir 🇧🇪 525 117 88ms 5 Feb 2024 816th msbranicky 522 152 3ms 2 Jan 2024 817th snoozingnewt 🇨🇦 521 121 1,597ms 15 Oct 2025 818th steffan-polygolf 521 133 11ms 29 Feb 2024 819th neihousaigaai 519 108 12ms 11 Feb 2024 820th dokutan 517 121 119ms 29 Oct 2024 821st JDiLenarda 🇫🇷 517 122 1,326ms 13 Sep 2024 822nd snoozingnewt 🇨🇦 516 125 2ms 15 Oct 2025 823rd aksyristos 515 81 48ms 30 Nov 2024 824th Bodo171 514 109 10ms 1 Jul 2024 824th trist224 🇫🇷 514 109 13ms 3 Aug 2025 826th JunkIce 513 104 370ms 3 Dec 2024 827th Kokusui 🇯🇵 513 108 5ms 26 Jul 2024 828th KatieLG 🇬🇧 510 109 1,050ms 2 Jan 2024 829th rollershutter 509 110 11ms 20 Dec 2023 829th fourth-bit 509 110 21ms 1 Jul 2024 829th jipsong 🇩🇪 509 110 20ms 5 Jul 2025 832nd snoozingnewt 🇨🇦 509 136 9ms 15 Oct 2025 833rd dokutan 509 156 3ms 26 Oct 2024 834th snoozingnewt 🇨🇦 508 143 3,668ms 15 Oct 2025 835th msbranicky 507 116 112ms 1 Jan 2024 836th typeswitch-dev 🇵🇹 507 151 5ms 25 Jun 2024 837th alphafalfa 506 107 2ms 26 Aug 2024 838th dokutan 505 100 7ms 28 Oct 2024 839th minhtrancccp 505 111 10ms 1 Dec 2023 839th croc54 505 111 20ms 30 Dec 2024 839th Mikey-Beep 🇬🇧 505 111 21ms 24 Jul 2025 839th CommandLeo 🇮🇹 505 111 21ms 1 Nov 2025 843rd MeWhenI 🇻🇦 505 132 90ms 1 Dec 2023 844th snoozingnewt 🇨🇦 502 133 86ms 15 Oct 2025 845th msbranicky 501 111 976ms 2 Jan 2024 846th KatieLG 🇬🇧 501 170 5ms 3 Dec 2023 847th knutae 🇳🇴 500 112 21ms 16 Dec 2023 848th scpchicken 🇵🇼 497 90 3ms 13 Dec 2023 849th janbehrens 🇩🇪 496 97 602ms 9 Jan 2024 850th mathisfun271 496 113 19ms 23 Dec 2023 851st msbranicky 496 142 17ms 6 Jan 2024 852nd Yewzir 🇧🇪 494 112 7ms 5 Feb 2024 853rd dokutan 492 163 117ms 6 Nov 2024 854th snoozingnewt 🇨🇦 491 116 694ms 15 Oct 2025 855th dokutan 488 111 2ms 28 Apr 2025 856th anarconic 487 115 10ms 11 Dec 2023 856th moustave 487 115 20ms 19 Nov 2024 856th damoose717 487 115 20ms 23 May 2025 859th HumanEquivalentUnit 487 133 14ms 5 Dec 2023 860th Protothor 485 119 10ms 20 Jul 2025 861st snoozingnewt 🇨🇦 484 112 2ms 15 Oct 2025 862nd NanduBC 483 116 11ms 6 Sep 2024 863rd msbranicky 483 130 2ms 2 Jan 2024 864th msbranicky 482 134 2ms 2 Jan 2024 865th Yewzir 🇧🇪 481 100 238ms 26 Feb 2024 866th tomh1012 481 152 418ms 12 Nov 2025 867th madeforlosers 479 113 2ms 8 Dec 2023 868th dokutan 478 140 40ms 29 Oct 2024 869th snoozingnewt 🇨🇦 475 167 3ms 15 Oct 2025 870th MaxCastella 🇫🇷 473 89 780ms 1 Dec 2023 871st dokutan 473 149 19ms 30 Nov 2025 872nd RockOfStone 470 140 4ms 23 Mar 2024 873rd msbranicky 469 118 5ms 2 Jan 2024 873rd dokutan 469 118 8ms 10 Apr 2025 875th trinityy-7 469 123 22ms 6 Dec 2023 876th Feniske 🇫🇷 468 90 272ms 1 Dec 2023 877th emgordon154 467 62 3ms 1 Oct 2025 878th dokutan 467 135 1,299ms 31 Mar 2025 879th dokutan 466 126 110ms 26 Oct 2024 880th HumanoidCPU 466 132 95ms 5 Jun 2024 First Prev 801–880 of 1,474 Next Last